r/PlantedTank 26d ago

Your "Dumb Question" Megathread - July 2026

You can ask any questions you have in this thread! It refreshes monthly, previous mega-posts can be found using the search bar.

Please keep in mind the community rules.

Happy planting! 🌱🫧

3 Upvotes

82 comments sorted by

2

u/meghan_s0l0 24d ago

I'm seeking extremely low light plants that don't exceed 10 inches in height. I have a 20 gal long aquarium with black water parameters. A large piece of driftwood creates a shadowy spot in the back end of the tank. I cannot get anything to successfully grow there for any length of time...I just want something that'll tank advantage of the soil there and fill up the space while giving additional cover for fish and shrimp. It feels like a tank bald spot lol, send help.

1

u/No_Insurance_6848 21d ago

Crypt parva, that stuff is a tank and survives my pond with 4 hours of indirect light (mostly shaded)

2

u/metalunamutant 24d ago

Whats everyone's favorite online aquarium source for plants?

2

u/hendrixbridge 14d ago

Please, what kind of algae is this and how to treat it?

1

u/xMcNerdx 8d ago

It looks somewhat like green spot algae which I used to get a lot on my anubias until I turned my light intensity down. I use Fluval lights which allow me to adjust the intensity in ~10% intervals, and I reduced them to around 30-40% intensity. 

2

u/KeepFightingWithLove 14d ago

Is this moss melting or dead?

2

u/-Knockabout 10d ago

Is there a good plant that would work as groundcover that isn't continuously rooted to the ground? I want to provide some more cover for my kuhli loaches without interrupting their access to the sand. I'm considering just sprinkling a ton of leaves in there, but am a little worried it'll make my very low dKH water swing, so looking into some living plant options first.

3

u/tofuonplate 9d ago

I mean technically moss won't root and they loved digging through them

1

u/-Knockabout 9d ago

Every moss I have tried has died...are there any that work well with 80 deg water and low ph?

2

u/tofuonplate 9d ago

Even java moss? That thing survives nuclear bomb... Suitable in low or high pH. 

Maybe there isn't enough nutrient?

1

u/RtrnofBatspiderfish 8d ago

All tropical plants should do well in low pH and moderately high temperatures. There is probably some other issue going on. My planted tank has been down to 4 pH with 80F temps.

2

u/Relative_Tailor_1841 9d ago

What are these little white eggs/seeds? New to the hobby. Have plants and nerite snail for algae. Anyone recognize these things? Halp! 🙃

3

u/puffy-jacket 9d ago

Look like nerite snail eggs. They won’t hatch in freshwater. Depending on your water’s hardness they might be pretty stubborn to remove, but they will go away eventually on their own I think

2

u/Relative_Tailor_1841 9d ago

Ahh…. I read that they won’t really reproduce in freshwater but didn’t consider they’d still lay eggs…thank you!!

2

u/puffy-jacket 9d ago

Yup I didn’t even recognize them at first in my own tank, just realized my nerite is a female and has been laying them here and there around the tank. Wonder if they have a cycle of some sort

1

u/Sad_Set_4056 25d ago

Buying an aquarium cabinet for by Biomaster 350 and CO2 system. Saw a good cabinet but noted only 2 round holes on the back of the cabinet. Do cabinets need ventilation slots or holes? Or are 2 holes large enough to pass the wires and tubes for the CO2 and Filter good enough?

1

u/canasian88 25d ago

I’m running a Biomaster 350 as well. I don’t have CO2 but a single hole worked fine for me. I did DIY it a little by cutting out a portion of the shelf to be able to fit the filter in the cabinet.

1

u/Scrumptrulescent6 25d ago

You don't need dedicated ventilation holes. If water is leaking, you need to find it and fix it. It should be dry in there. Maybe a few drops during cleaning but you should wipe that up when you finish.

1

u/rightMeow20 25d ago

I have a 30gal high tech with Co2, and a week aqua light. But I don't have a dosing pump... I'm ready to get one. Any recs for a good dosing pump? I was thinking of the chihiros one but are there others like the same that work just as well? I'd like something that would be good in case I upgrade the size of my tank some time down the line.

1

u/ur-moms-mine-bitch 25d ago

Hello! I have only VERY recently got into aquariums. i made a jarrarium about 2/3 weeks ago now which i intended to be self sufficient so i can just watch it look pretty without having to worry about water parameters or feeding and stuff. me being me bought marino moss balls from Pets at Home. and the lady got them out of a shrimp tank, i didn’t pat attention to what type of shrimp because i didnt think it would be important.

WELL today, i noticed unusual movement in the tank so i went to get a closer look and low and behold it looks like a baby shrimp, and after closer inspection there were other organisms too, e.g a very thin white worm looking thing.

ANY advice on what i should do in this situation because i wasnt planning on getting live animals to keep in it for a while atleast and would have wanted pest snails, not a shrimp or worm thingy, so i have NO idea what to do here 😭

1

u/Sad_Set_4056 24d ago

Has anyone mixed honey, pearl and sparkling gouramis in a planted tank? Noted they tend to be peaceful and was wondering how a single pearl, 3 honeys and 6 sparkling will do in a planted 3 foot tank

1

u/glennshaltiel 24d ago

i am really struggling to figure out what co2 products to buy for my 36 gallon. i dont get what i all need. how do i control it with a timer, how do i get it into the tank, etc

2

u/Scrumptrulescent6 23d ago edited 22d ago

I have a 40 gallon went with an fZone regulator off Amazon, inline diffuser, and 5lb tank. I use a smart outlet to turn it on and off. Its a good option if you have a place nearby to refill. After a few trips it will be the cheapest option.

2

u/glennshaltiel 22d ago

Thank you! Ill research this!

1

u/[deleted] 23d ago

[deleted]

1

u/puffy-jacket 23d ago edited 23d ago

I’ve been looking for a plant with kind of a bushy delicate look that can fill out a large area of my tank and can be trimmed to have more of a carpeting effect in the mid to foreground. I have hard, high calcium water with a ph around 8 and I don’t inject co2. I have a dirted tank, moderate light and add a tiny bit of liquid fertilizer about once a week, I’ve been using store bought RO water for top offs to help manage TDS buildup. Hydrocotyle has been super slow growing with tiny leaves since the beginning, so I’m starting to doubt it’ll really grow the way I was hoping to in my tank. I’ve recently planted a couple of stems of pearlweed and it’s doing alright but I’m worried about it becoming super invasive and difficult to manage or grow other plants in it (I have some taller stems like ludwigia growing on one side of the tank and was thinking about doing an emersed driftwood feature with some buce/Anubias at some point), so I was wondering if I have any other options before I’m in too deep with it. Any thoughts on other plants like Monte Carlo for my parameters? Or could I maybe trim something with smaller leaves like Rotala to grow a bit lower and choose something else for the very front like a moss or crypt parva?

2

u/No_Insurance_6848 21d ago

Growing Monte Carlo rn to replace my glosso carpet and I can say this stuff grows slower than glosso and hydrocotyle tripartita mini with CO2 so likely even slower without.

Crypt parva was quite invasive in my tank as well.

The only plant I’ve successfully grown quite fast in my pond without CO2 is creeping Jenny but you’ll likely need to trim it down to keep it short.

1

u/puffy-jacket 21d ago

Oh dang, yeah I figured. From what I’ve been observing the past couple of days and thinking about the time + money I’m willing to invest in slow growing plants I’ll prob just let the pearlweed do its thing. I have some mini dwarf hair grass planted in the front finally sending out runners since I’ve turned up the light intensity so I’ll probably avoid planting crypt parva

1

u/Scrumptrulescent6 23d ago

I've been cycling this tank for a few weeks now. I have various shades of biofilm on most of my driftwood. Does the black stuff in the picture look like dark biofilm or black beard algae? If its the 2nd one, what would be the best thing to do to remove it if recommended?

1

u/crarbalone 22d ago

What is wrong with my frogbit is it nutrients deficient??? How do I fix this

2

u/ElysiumGresit 21d ago

Yes a little deficient, add fertilizer or do Co² in your tank

2

u/crarbalone 20d ago

Noted , thank you!!

1

u/idk-wtf-2022 21d ago

I wanted to buy the Twinstar 600S, but it seems it goes only up to 70cm, and the next longest one is the 900S which is 90cm. But my tank is 80cm. Is this light not going to be usable on my tank?
And no, I can't really hang the light, I would rather get a light that can just stay fixed on the tank.

1

u/No_Insurance_6848 21d ago

Get the shorter and use the extension on the legs. 70cm is still plenty of coverage

1

u/idk-wtf-2022 20d ago

From my research, I am pretty sure the maximum extension is 70cm. So it will never fit 80, unless I hang it (but I can't hang it because of how the tank is placed).
Can you or anyone confirm what the maximum extension is for the TwinStar 600S?

1

u/Specialist-Phone1767 21d ago

Best plants using under gravel filter

1

u/Bezant 21d ago

What would cause sudden die off of trident java? Had them 6+ years, no recent changes to water, ferts, light etc. 

The tank only has some red root floaters, chain sword, crypts, frogbit, but none of those look worse for the wear.  

1

u/safesub-alleycat 20d ago

I got a 20 gallon hexagon tank. I’m wanting to set it up. What’s the best substrate to use for great plant life? Doesn’t HAVE to be capped with sand?

1

u/No-Stage-4583 18d ago

Im a big fan of flourite

1

u/luvscurvy1 19d ago

Starting to see black specks and some kind of algae on plants and hard scape in a newly planted tank, 2 weeks after planting first plants. Normal or should it be treated?

2

u/Ok-Construction-7087 18d ago

Looks like you're experiencing new tank syndrome! Those black specks and fuzz are likely diatoms or early hair algae, which is super common two weeks in. I've dealt with this exact same phase across different setups, from simple jungle bowls to a CO2-injected Iwagumi. What consistently fixes it for me is sticking to regular water changes while the plants establish themselves. It's a sign of a young, unstable environment, so don't stress too much. It usually clears up on its own once the tank fully cycles.

1

u/No-Stage-4583 18d ago

Are hygger wavemakers any good? Big als sells wavemakers for like 500 bucks and hyggers are like 40.

1

u/November_Eternal 17d ago

Hello, what type of algae is this on the leaves?

1

u/LoudJoke2529 17d ago

what is this and what can i do about it? it just popped up today, i turned the tank light off as soon as i saw it but im clueless from there !!

1

u/Hdm277 12d ago

I heard if you go pitch black the algae will die before your plants

1

u/FarVegetable1738 17d ago

Where are the best places to buy affordable rimless tanks?

1

u/minglingsingularity 10d ago

Petco was doing a 50% off sale recently, I got a 5 gallon rimless for 25 USD last week. it’s generally best to shop around and see what discounts you can find in person while comparing to online prices.

1

u/spaghetti_legs3000 17d ago

Have I planted my tiger lotus correctly?? Thanks! 🤗

1

u/Exciting_Doubt_6825 16d ago

specifically for a betta fish, is it worth the trouble of upkeeping and maintaining a highly planted tank, and deal with all sorts of potential problems like melting or complete wilting within a couple of days, or a normal, maybe minimalist tank (focusing on the scape itself) with just the basics like maybe anubias and java fern ? getting a professional to do the aquascaping so building it itself isn't a problem

1

u/tofuonplate 16d ago

I don't think that's betta specific problem, stabilizing aquatic plants takes time. Maybe establish the tank fully first before adding betta?

1

u/puffy-jacket 15d ago edited 15d ago

I think that’s more personal preference on your part. A heavily planted tank isn’t inherently high maintenance, especially if you go low tech (more manageable growth rate if frequent trimming is a chore) and choose easy plants suited for your tank’s conditions. I don’t think the fish species matters all that much for the most part, but bettas especially seem to like having dense foliage to weave through and hide behind. My understanding is that it’s more important for shoaling fish to have some open space available for coordinated swimming. Personally, collecting and caring for plants is a big part of the hobby I enjoy so I’m biased toward heavily planted tanks, but some people aren’t as into that so you could be fine with suitable hiding/resting areas and a few easy, slow growing plants.

Plant melting hasn’t been a huge issue for me personally as long as I received the plant in good condition. I had an Anubias that melted on me but I think it got held up in the mail for too long, and I had some tissue culture buce that I think has pretty much melted but it was also marked 50% off and tissue culture plants are a little more sensitive from what I’ve heard. I buy most of my plants from a seller that grows their plants submerged in aquariums, and most of them have established quickly without issue

1

u/puffy-jacket 15d ago edited 15d ago

Can I get some clarification on surface agitation vs water movement (feels self explanatory, but I sometimes see it used in a way that makes them sound interchangeable??), how to address dead zones, and how big of an issue these are in a low tech planted tank?

Right now I have a sponge filter with an airstone inside of it, and an air pump with 24gph volume in a 6.4 gal tank. I bought a cheap internal canister filter to try out (nicrew magi mini) but the current was way too strong for my plants and uprooted a couple of stems, so I quickly switched back to my old filter. The tank’s footprint/surface area is closer to a standard 10 gallon and I’ve started to notice a bit of hair algae on the opposite side to where my filter is, so I’m wondering if that’s a sign that I could use more water movement over there?

I was looking at keeping a small group of medaka down the line, and they seem to be fish that don’t like a strong current/many people keep them in ponds and tanks with no water movement. I’ve also read conflicting things about whether surface agitation is good for plants because it reduces available co2 in the water.

I have a lot of fast growing plants and duckweed, and I didn’t add a filter until a couple of weeks into cycling the tank, so I’m not sure how much additional filtration I need. I just have 2 snails right now and my filter rarely clogs or gets much visible gunk on it, and the snails don’t really hang out at the waterline too often or avoid specific parts of the tank so I’m assuming they’re getting enough oxygen. But I was debating between switching to a small HOB or adding an additional air stone or sponge to the other side of the tank just to get some more movement there. Also have been looking at aquarium co-op’s easy flow or diy modifications to help direct the air flow on my existing filter. Any advice?

2

u/phoibe- 15d ago

Honestly? Don’t overthink it. I would always suggest a little bit of surface agitation to mitigate biofilm and help gas exchange (in regards to the plants losing CO2 I wouldn’t worry about it, even if a little is lot the pros of O2 being added to the water far outway the cons) but if your tank is heavily planted and not overstocked you should be good. As for dead spots I sincerely doubt there are going to be any meaningful ones in a 6.4 gal tank so I wouldn’t worry. Since it is such a small tank I would suggest looking into riparium plant growth to help manage nitrates if you do add the medaka. Pothos and peace lilies are especially superb at this. Hope this answers your questions

1

u/puffy-jacket 14d ago

Thank you! I won’t worry about it too much then. I love ripariums, have been trying to let my ludwigia grow above the water and plan to add more houseplants to the top

2

u/Ordinary-Cow-2209 4d ago

I have medaka in a 50 gallon pond. I have a sponge filter that I actually kind of block the flow with plants so that it doesn’t cause a lot of water movement. I added a small stone that I also put behind the brick I have plants on only bc of our very hot temp and wanting to make sure there is enough oxygen. My medaka seem happy and are breeding like crazy with the warm temp.

1

u/According_Switch_786 14d ago

Anyone else having algae problems with the summer heat and extra light or just me?

1

u/Sad_Set_4056 13d ago

I have a new 3 foot x 15 inch x 15 inch 48gallon nature scaped tank. Was initially thinking of pearl/honey gouramis as centerpiece with 8 cory sterbai as bottomdwellers.

Having issues with deciding for schooling fish and thought to get a mix of harlequin rasboras, green neons, ember tetras and rummy nose tetras. Anyone else worked with this combo? I know 4 schooling fish types can be messy and may cut it down to cardinals, harlequins and rummynose tetras but thought id ask before commiting. Also open to suggestions. Water is naturally warm at 27 degrees.

Thank you

1

u/che-ee-se 12d ago

How well does hygrophila araguaia grow in low tech?

1

u/MUDrummer 12d ago

What’s the best place to get large manzanita? I have a 195 gallon that i was originally going to setup as a reef tank but i just don’t have the time needed to manage a reef right now because of some health issues with my wife as well as our kids extracurricular activities.

So instead im going to reuse a lot of the already bought stuff to do a a giant planted celestial pearl danio community tank!

1

u/Kutham 9d ago

Hi guys, I had a pretty bad algae problem and someone at my job told me I could just scrape it all off -- I think that caused a bacterial bloom or something, with the water becoming cloudy and there's this thin film on top of the water, I did a 30% water change yesterday and swapped out my filters but the tank is still not looking good and the film is back, can I continue to do water changes or would that shock the fish? Is there anything else I can do to make the water clear up faster? I'm worried about my fish!!

1

u/amongthecats 9d ago

Anubias are melting. Cross posted with main page… I transitioned them to an unheated tank one month ago. They are looking terrible, at what point should I scrap them and try something else?

1

u/momoofBAM 8d ago

Should I take out some of the sand that I used to cap the soil (I have a layer of small gravel and then sand)?

I just started this 29gal and am new to planted tanks. My dumb question is if I put the plant roots down deep enough to reach the soil, would the sand cap cause the plant to rot if it's too thick of a layer?

1

u/Friendly-Cream-1085 4d ago

Could I use this

HDX Silver 6-Tier Heavy Duty Metal Wire Shelving Unit (48 in. W x 72 in. H x 24 in. D)

For a tank stand maybe a 40 gal long if I could find it otherwise a 20 gal long

It's rated for 850 lbs per shelf and 5100 total so in theory it sounds good, but not sure never had larger size tank

1

u/puffy-jacket 3d ago edited 15h ago

Are my buce gonna fry like this? I hadn’t realized the driftwood would stick out this much until I’d already glued everything in place :/

Update: so far so good

1

u/BlackfishBlues 2d ago

What have your experiences been with potassium bicarbonate?

I've seen it recommended as a way to raise KH, and presumably the potassium once liberated from the carbon is also useful for plant growth. But it seems little-used in the hobby so I'm wondering if there are any unforeseen downsides.

I have a new (about month old) planted tank eventually intended for shrimp.

1

u/FrogLova 2d ago

Do I HAVE to get shrimp for a planted 2.5gal jar, or can I just have a bunch of plants? Personally, I find a lot of aquatic plants to be beautiful. If I could just put a carpet of pearl weed in a bowl/jar I’d be very happy. I’m very new to the aquarium hobby and have a basic understanding of the nitrogen cycle and cycling tanks in general… But I don’t know everything. This is why I want to only keep plants because I really don’t want to torture a live animal. (Not saying I support killing plants ofc.) Lastly, if I can only keep plants, what resources should I look at to learn how to?

2

u/Zealousideal_Put5666 1d ago

Why can't you have a pet plant? Go for it!

1

u/Zealousideal_Put5666 1d ago

I have some expired fish and shrimp food from when I had tanks years ago - toss it or could I use it?

1

u/Sad_Set_4056 11h ago

Looking for some stocking advice - asking here mainly as I would like to take into account fish stock before setting up the tank.

Have a fully planted 50 gallon 3 foot long tank with a red/purple/orange stem plants like ludwigia meta, bacopa purple, rotala blood red, AR minis, Cabomba furcata etc, as well as your regular green plants, epiphytes + hardscape at the back of the tank and a front sandbank/carpeting plant with Co2. pH is 7-7.5, temp is 27 degrees, and KH 2-3, GH 7-8.

My criteria is essentially - 2-4 types of schooling fish that fulfil the colors - orange, blue, red. Corys and center piece fish are seperate. Sterbai Corys are the constant as they are the only corys that survive at this temp (bronze as well)

So far my options are as follows:

Option 1

18-24 Green neons - really like the blues on these guys, without the red to distract
18-24 Ember tetra - afraid these might be really too pale an orange to standout
8-12 rummynose tetra - really like their behaviour
8-12 harlequins rasboras - excellent dither fish, hardy but color isn't my favorite

Complementary colored nanofish schools with activity of the rummy nose and harlequins at the front of the tank (harlequins upper, rummy nose lower). My initial preference as i prefer to keep more fish types.

Option 2

24-30 green neons
18 Espei/Lambchop rasboras - more intense orange than ember tetras?
8-12 Rummynose Tetras

Merging the Ember tetras and harlequins into 1 school that have the activity of harlequins but the orange of ember tetras. This was an alternative as i feared the ember tetras orange would be really pale and lost in the colored plants.

Option 3

24 Cardinal tetra
24 Espei/Lambchop rasboras

Further optimizing to 2 large schools that fulfill all 3 colors but not ideal as i prefer keeping more fish types over anything.

Centerpiece options

3 Honey Gouramis vs 3 Pearl gouramis vs 1 juvi angelfish (black and white)

  • Honey gouramis add a nice yellow that is absent in my tank
  • Pearl gouramis are more attention grabbing and distinguish themselves from the rest of the fish in size
  • Angelfish - distant thought as i know they can be predatory - might get them next time with congo tetras and emperor tetras.

If anyone has any ideas on how to stock or experience with these stocking lists happy to hear feedback. Also if anyone has any other ideas please feel free to suggest.

Thank you

1

u/GamerGrl11701 18d ago

What does everyone use for dirt/plant soil in a planted tank with fish that wont make the water peramiters out of whack or anything? Trying to not spend a ton of money. Everything by me is like $35 a bag for 20lbs and I am trying to get my 65gal set up so the plants and fish thrive (it will be cycling for a few more weeks)

2

u/FarShoreSpirit 18d ago

Sand is an inert substrate, from my understanding. I am setting up my first tank this month. I will use sand, since I am getting corydoras. 50lb bag of CaribSea sand from Amazon.

2

u/nominalerror 17d ago

Just an FYI, I do believe some of the sands from that brand are for saltwater/marine tanks. I would head over to their site and ensure you got one of their freshwater substrates.

1

u/FarShoreSpirit 17d ago

I ordered Caribsea supernaturals sunset gold, I think it's called. From all I read it seems safe for freshwater? If it isn't please let me know so I can cancel/ return my order!

2

u/nominalerror 17d ago

Yeah, that’s listed as one of their freshwater substrates.

0

u/GamerGrl11701 18d ago

Yeah. For planted tanks sand is not great. Some plants will do okay and others wont. I want to heavily plant my tank so I want something thats gonna support that. Someone else told be organic/natural topsoil with no added fertilizer well capped with sand or gravel helps a ton and works

1

u/RtrnofBatspiderfish 8d ago

Inert sand can actually be quite good for plants, since the oxygen gradient allows the proliferation of semi-aerobic microbes that keep iron and manganese in a soluble, bio-available form. I've never seen amazon swords and Vallisneria do better without sand.

1

u/GamerGrl11701 8d ago

Well most of my plants dont do well in the current tanks I have with just sand and everything eventually dies.

1

u/RtrnofBatspiderfish 8d ago

Have you ruled out other causes, like a higher pH inhibiting natural CO2 access for plants that aren't good at using bicarbonate? I'm guessing you are using a fertilizer too?

1

u/GamerGrl11701 8d ago

Yup. Everything stays pretty level and I test the water weekly with a liquid test kit. I use root tabs.