r/fishtank is a subreddit with 101k members. The community frequently discusses fish, help, tank, fish tank, and filter, and they frequently recommend/review fertilizer, stocking, and plant, and the most common flair used is help/advice, freshwater, show & tell, full tank shot, and diy/build.
A place to connect with fellow fish lovers, share photos, videos, and help new fish keepers!
Popular Topics in r/fishtank
#1
Fish
34 posts
#2
Help
29 posts
#3
Tank
28 posts
#4
Fish Tank
22 posts
#5
Filter
8 posts
#6
Shrimp
8 posts
#7
Breeding
8 posts
#8
Betta
6 posts
#9
Algae
5 posts
#10
Cycling
5 posts
Products Discussed in r/fishtank
Fertilizer
9 reviews
#1
Seachem
4.8★ from 4 reviews
#2
Aquarium Co-Op
5.0★ from 2 reviews
#3
Osmocote+
5.0★ from 1 review
Stocking
3 reviews
#1
Betta
4.0★ from 1 review
#2
Ember Tetra
4.0★ from 1 review
#3
Shrimp
5.0★ from 1 review
Plant
1 review
#1
Hornwort
4.0★ from 1 review
Flair Used in r/fishtank
#1
Help/Advice
: "Is it normal for my Cory’s to swim around like this?"
57 posts
#2
Freshwater
: "I can stare into this tank for awhile"
11 posts
#3
Show & Tell
: "Really flat fish, caught from a swamp forest"
10 posts
#4
Full Tank Shot
: "Golden water, green life, happy fish."
5 posts
#5
DIY/Build
: "He sleeps like he pays the rent🌻🫠"
3 posts
#6
Plants
: "Plants disintegrating *help*"
2 posts
#7
Invert
: "My 4 months old, 4 gallon cube."
1 post
#8
Discussion
: "Upgrading, what should I add?"
1 post
Member Growth in r/fishtank
Yearly
+29k members(40.2%)
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6.5% / yr
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14.1% / yr
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16.7% / yr
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7k members
2.7% / yr
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37k members
32.1% / yr
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86k members
19.0% / yr
About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/fishtank, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: November 1, 2026