r/fishtank is a subreddit with 92k 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, show & tell, full tank shot, discussion, 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
: "Why do my fish do this a lot of the time?"
119 posts
#2
Show & Tell
: "MY BEAUTIFULL FISH WORLD"
29 posts
#3
Full Tank Shot
: "A 2 year old tank"
24 posts
#4
Discussion
: "The aquarium hobby has a gatekeeping problem and it's killing the community."
16 posts
#5
Freshwater
: "Fish tank FREE"
6 posts
#6
Other
: "I drew this mackerel!"
2 posts
#7
DIY/Build
: "Does this diy stand look sturdy enough?"
2 posts
#8
Plants
: "Brand new 45 bow setup"
2 posts
Member Growth in r/fishtank
Yearly
+28k members(44.6%)
Similar Subreddits to r/fishtank
r/Aquariums
1.5M members
6.2% / yr
r/AquaSwap
117k members
13.9% / yr
r/bettafish
336k members
17.3% / yr
r/BettaJunkies_USA
7k members
3.5% / yr
r/fishkeeping
33k members
31.2% / yr
r/Goldfish
82k members
22.5% / 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: June 14, 2026