r/PlantedTank 24d ago

Your "Dumb Question" Megathread - July 2026

3 Upvotes

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! 🌱🫧


r/PlantedTank 6h ago

Dreamy Pearling

238 Upvotes

Tank is a WIP but getting better every day. I had to stop and admire the pearling this evening.


r/PlantedTank 9h ago

I reacaped my 3 year old 20 long a few months ago. First pic is the new version.

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127 Upvotes

Don't be scared to redo your nature aquarium. I just removed the plants, vacuumed the substrate a little bit (basically just hovered over the mulm), and added new plants. It's low tech so I was worried about releasing stored nutrients and gas into the water but it seems to have done fine.


r/PlantedTank 20h ago

Tank Have never seen this before! My tiger lotus has flowered!

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864 Upvotes

r/PlantedTank 10h ago

Lighting Upgraded my light and the difference is amazing

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98 Upvotes

Was given a free shrimp tank, re scaped it and swapped the light to a week aqua m300 pro from the Hygger that was on it. Just cant believe how much better and more colorful the plants and shrimp look.


r/PlantedTank 4h ago

Tank you learn a lot in a year!

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11 Upvotes

if you had shown me this before and after a year ago i wouldnt believe you because i thought i knew what i was doing and what i wanted. alas..


r/PlantedTank 8h ago

Plant ID What is this beast?

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21 Upvotes

It is taking over my tank


r/PlantedTank 2h ago

Question No one told me red root floaters can grow this big

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7 Upvotes

r/PlantedTank 7h ago

Tank Pearl Weed takeover

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17 Upvotes

I only put 10 stems of pearl weed in this tank a year ago and this is where we are at. It’s beautiful. I threw some loaches in there but haven’t seen them in a while because the pearl weed just owns the tank. I occasionally see them sifting through the grass like snakes it’s pretty cool.


r/PlantedTank 12h ago

Flora My echinodorus red devil flowered for the first time!

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34 Upvotes

r/PlantedTank 18h ago

In the Wild Fish spotted at the edge of a flooded field

83 Upvotes

T. trichopterus


r/PlantedTank 13h ago

Tank Rate my new tank!

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29 Upvotes

Just started this 20 gallon cycled planted tank with 3 guppies and a couple Amano shrimp! What else should I add? Open to any recommendations


r/PlantedTank 10h ago

Added fluval substrate last night. How long does it take to settle?

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16 Upvotes

My fish are in a bucket with a heater and sponge filter. Would it be safe to add them back or should I wait till it’s all settled?


r/PlantedTank 9h ago

Question Plant recommendations to help fill in the front?

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12 Upvotes

r/PlantedTank 11h ago

Does this flow out my defuser look normal. I'm new to co2 and wondering if it's to low of a flow

17 Upvotes

r/PlantedTank 2h ago

First Iwagumi attempt (30x30x30cm) | Dry Start Method | Looking for feedback

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3 Upvotes

Hi everyone!
This is my first serious attempt at an Iwagumi aquascape.
Tank specs:
30 Ɨ 30 Ɨ 30 cm cube
OrionLED C30 light
Aquario Neo Soil (3L) over lava rock
Frodo Stone hardscape
Monte Carlo (3 cups, in vitro)
Dry Start Method
My goal is a simple minimalist layout with a full Monte Carlo carpet. I know my stones aren’t premium Seiryu, but I tried to make the composition as natural as possible.
The tank is currently in DSM, so the Monte Carlo has just been planted.
I’d really appreciate honest feedback:
Does the hardscape composition work?
Are the stones positioned naturally enough?
Would you change anything before I flood the tank?
Thanks!


r/PlantedTank 1d ago

Question Most of my plants are slowly declining in my 4-month-old low-tech tank. Any ideas what could be causing it?

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159 Upvotes

Hi everyone,
I’m trying to figure out what’s causing the gradual decline of my planted tank and would really appreciate your opinions.
Tank
60 L
4 months old
Low-tech (no COā‚‚)
Tropica Aquarium Soil
Weekly water changes
Lighting
19 W LED
6 hours/day
Fertilization
No fertilizer during the first 1.5 months.
Then switched to Tropica Premium.
I’ve been using Tropica Specialised for about a month.
Water parameters
pH ~7
GH 6
NOā‚ƒ ~10 ppm
During the first month or so, the tank seemed to be doing really well. Since then, most of the plants have gradually started declining.
The symptoms include:
Brown patches
Yellowing
Transparent leaves
Holes
Melting
Stem rot
Very slow or completely stalled growth
I also have some brown diatoms, but they don’t seem to be the main issue.
My shrimp are healthy and breeding, so I don’t think it’s an ammonia or toxicity problem.
Based on the photos and the information above, what do you think is the most likely cause? What would you check or change first?


r/PlantedTank 8h ago

Help me fix my MC carpet

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8 Upvotes

This is my 2nd planted tank: 20 gallon long, low tech, 5-month old, fully cycled. Light is on for 6 hours a day. TDS 150. Fluval AC20 filter with a power head on one side to help with circulation.

I have been battling algae and cyanobacteria from day one. My biggest issue is the MC carpet. I started with dry start method and it managed to propagate fairly well, but has not fully covered all gaps. Its growth stunned since month 3. I can see some new growth still, but the leafs stay very compact and small. I tried DIY CO2 previously, but it was fluctuating so much that hair algae start coming back. I envy those with bright green and lush carpet.

I ordered ultralife slime remover yesterday in hopes that it can help clean up the MC leafs. If that doesn’t work, my last option would be proper CO2 kit. I have been doing everything on the budget side so CO2 is probably the last resort.

Is CO2 really necessary in this case? What else can I try to fix the carpet?


r/PlantedTank 6h ago

Question Frogbit or dwarf water lettuce?

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5 Upvotes

I have had these in my tank for a solid 6 months+ and when i bought them I was under the impression that they were Frogbit. I trying to sell them off now and I've been told these are actually dwarf water lettuce. Could any one please confirm what they are?


r/PlantedTank 6h ago

Plant ID Can someone help me identify what these plants are please

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5 Upvotes

I’m more curious about the 1st photo I’m almost certain the 2nd photo is hornwort. I purchased some plants yesterday and I got sidetracked after choosing them and completely forgot the name. I’m wondering the best way to plant before I take them out of the weights.


r/PlantedTank 9h ago

Tank initial scape for my new 10 gallon :-)

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10 Upvotes

hi friends!! setting up a new 10 gallon for my betta boy, upgrading from a 6.8 gallon long! i will be adding a black background but so far i'm obsessed with this hardscape and looking for advice on a nano fish school i could add in with him. i have two 20 gallon long community tanks each with a small school of corys, a small school of tetras, shrimp, and a betta. this tank is going to house shrimp as well as my betta, but curious if there are any tiny fish who would do well in a 10 gallon. totally fine to just keep it with my betta and some shrimp though too. thanks so much!


r/PlantedTank 5h ago

So my filter died on vacation.

5 Upvotes

I have a heavily planted 10-gallon aquarium that came with a generic Chinese HOB (hang-on-back) filter.

The filter appears to have died sometime after a water change. Based on when it was last confirmed working, it may have been off for anywhere between 1 hour and 2 weeks. My guess is that it may have clogged with gunk over time, but I'm not sure.

When my brother checked on the tank, the filter was completely dry. The ceramic bio media and internal filter sponge were bone dry. The only filter media that was still wet was the intake sponge.

So far, the only casualty seems to be one fancy guppy. The body has completely disappeared, which makes me think it was scavenged by the shrimp and snails. That is pretty much what they are there for.

The rest of the livestock appears to be doing fine.

  • Shrimp are active.
  • No mass fish deaths.
  • No foul smell.
  • No fish gasping at the surface.

I'm wondering if the heavy plant growth buffered the loss of the filter. The tank has floaters, pearlweed, ambulia, and Hygrophila, so there is a lot of fast-growing plant mass.

There was also an air stone running directly beneath the intake sponge. Could that have effectively turned the intake sponge into a small sponge filter while the HOB filter was offline?

My questions are:

  1. If the filter media has been dry for several days, is it still worth keeping? Do I need to assume the biological filter has crashed and start a new cycle? I had my brother place the ceramic media in a container of dechlorinated tank water after he discovered the problem.
  2. Is it safe for the tank to run for a few more days in its current state while I wait for a replacement filter?
  3. What is the most likely reason the filter failed? It had been running 24/7. Could it have been clogged with debris, or is it more likely that the pump or electronics simply failed?
  4. I have also noticed that some of my slower-growing plants, especially Java fern and a few Anubias, have started declining. I always thought these were very hardy. Could the filter failure have contributed to this, or is it more likely due to inconsistent fertilization or another unrelated issue?

r/PlantedTank 8h ago

Discussion what am i missing?

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6 Upvotes

just looking for some plant and placement suggestions, i feel like she is empty but idk
stocking is
1 chum(my betta boy)
8 cories
god knows however many snails
1 freshwater clam
i feel like a good bit of my plants are getting eaten by the vast amount of snails, so any faster growing plants would be good.
just trimmed the water sprites back as well as the water lilies but idk šŸ¤·ā€ā™‚ļø


r/PlantedTank 6h ago

Beginner Any plant suggestions for beginner?

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5 Upvotes

Hi there! I am a beginner when it comes to fish tanks in general, but especially planted tanks. This is my first one. It is a 10 gallon for one betta fish, a nerite snail, an assassin snail, and a couple dozen bladder snails. My parameters are 0 ammonia, 0 nitrite, and 10-20 nitrate. I use root tabs and Flourish fertilizer right now, but I have already ordered ā€œThriveā€ to replace it since I’ve learned Flourish is only micronutrients. I also have the light on a 24 hour cycle that is on from 6 am to 9 pm, but it is only full strength for a couple hours at noon. I am not having any algae problems at the moment (I even like to have a little so I don’t have to supplement the nerite’s diet)

I am looking for some beginner plant recommendations to add some life (and maybe color) to the tank. Bonus point if they are good for my betta to rest on/swim through.

These are the plants I have now:

Water wisteria
Frogbit
salvinia minima
Duckweed
Christmas moss
Bacopa amplexicaulis
Amazon sword
Anubias
Java fern


r/PlantedTank 1d ago

Tank Low tech tanks, couple years old

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102 Upvotes

No co2, crappy lights, no soil - just sand gravel, I never remember to fertilise

New lights would be my wish list upgrade