r/fishtank is a subreddit with 98k 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, full tank shot, show & tell, diy/build, and freshwater.
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
: "Glittering runnynose tetras"
109 posts
#2
Full Tank Shot
: "New planted tank. Any advice?"
17 posts
#3
Show & Tell
: "What should I do to my tank"
14 posts
#4
DIY/Build
: "First Fish Tank!"
11 posts
#5
Freshwater
: "CAUGHT MY PLATTY GIVING BIRTH"
10 posts
#6
Discussion
: "Aquarium Price Regrets"
6 posts
#7
Plants
: "Does anyone in Houston want these for free??"
4 posts
#8
Other
: "check valve whistle"
1 post
#9
Blackwater
: "Thinking of adding more tanins and making this tank a blackwater setup"
1 post
Member Growth in r/fishtank
Yearly
+30k members(43.4%)
Similar Subreddits to r/fishtank
r/Aquariums
1.5M members
6.3% / yr
r/AquaSwap
121k members
14.1% / yr
r/bettafish
347k members
17.0% / yr
r/BettaJunkies_USA
7k members
3.0% / yr
r/fishkeeping
35k members
31.4% / yr
r/Goldfish
85k members
20.2% / 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: August 31, 2026