r/fishtank is a subreddit with 94k 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, freshwater, and discussion.
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
: "1 year old I babysit has his "Bish" that his parents bought for him."
124 posts
#2
Show & Tell
: "not all fish lay eggs.. some gave birth."
19 posts
#3
Full Tank Shot
: "How it started vs how it's going"
17 posts
#4
Freshwater
: "Bubbles Bleu 🫧 🍾 🫧"
12 posts
#5
Discussion
: "New post about stocking my bargain Biorb"
8 posts
#6
Other
: "Feeding time"
7 posts
#7
DIY/Build
: "My tank was 100% natural. Then I decided to add a fish hide. Things escalated."
7 posts
#8
Plants
: "Dahlia growing like crazy"
4 posts
#9
Curious if anyone else knows
: "Harlequin Rasbora with a Weird Fixation on Swordtail (ignore the audio please)"
1 post
Member Growth in r/fishtank
Yearly
+29k members(44.9%)
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6.2% / yr
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118k members
14.1% / yr
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339k members
17.4% / yr
r/BettaJunkies_USA
7k members
3.6% / yr
r/fishkeeping
34k members
31.1% / yr
r/Goldfish
82k members
22.0% / yr
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: June 28, 2026