r/fishtank is a subreddit with 100k 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
: "Little fish in my shrimp bag."
58 posts
#2
Show & Tell
: "Yellow-green fish I found in a drying blackwater ditch"
8 posts
#3
Full Tank Shot
: "You’ll never realize when you’re at your peak of greatness until it has passed. I think this was it for me. I bought 10 embers the rest came from love :)"
5 posts
#4
Discussion
: "What’s missing?"
5 posts
#5
Freshwater
: "CPDs here we come"
5 posts
#6
Blackwater
: "An update on my tank"
3 posts
#7
DIY/Build
: "What do you guys think I can do to improve upon my tank. I want more of the jungle style look"
2 posts
#8
Plants
: "quarantining floating plants, how long should i wait?"
1 post
Member Growth in r/fishtank
Yearly
+29k members(41.7%)
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About
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This page gives a focused view of r/fishtank, including current member size, discussion patterns, product reviews, and related communities to explore.
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Last updated: October 2, 2026