About r/Aquariums
In its own words:
The subreddit for anything related to aquariums! Come here to enjoy pictures, videos, articles and discussion. We're also here to help you if you need advice.
Community guide
r/Aquariums (#681, about 1.6 million subscribers) — The subreddit for anything related to aquariums! Come here to enjoy pictures, videos, articles and discussion. We're also here to help you if you need advice. A recent sample averaged 189 posts a day (~32% image, ~30% gallery, ~20% text). Its public rules include: Attacks, derailing, and trolling are not tolerated; Dead and dying animals must be tagged NSFW.
What belongs here
Stay inside the room’s stated scope rather than adjacent off-topic dumps. Match posts to: Attacks, derailing, and trolling are not tolerated; Dead and dying animals must be tagged NSFW.
How it differs from lookalikes
Prefer this room when your post matches its description and rule list—not merely a larger sibling community.
Practical pointers
Read the live sidebar/rules before posting; rules can change. Common flairs include: Advice Needed, Showing Off My Tank, Beginner Help, Medical Help. Volume is high—clear titles help.
The community was created on Nov 10, 2009, which makes it 16 years old. Since Nov 2, 2026, it has gained 1,194 subscribers (+0.08%). Among the 5 communities on our aquariums and fish list it is the largest. It sits just behind r/environment (#679) and ahead of r/StartledCats (#681) in our ranking.
What sets r/Aquariums apart
For its size it is unusually busy: about 121.2 new posts a day per million members, more than 97% of the Top 100. Its rhythm is strongly tied to time zones: the busiest hour (17:00 UTC) sees about 4.4× as many posts as the quietest (06:00 UTC).
Subscriber growth
Between Sep 19, 2026 and Nov 9, 2026, r/Aquariums climbed from 1,546,599 to 1,556,455 subscribers (+9.9K, +0.64%). That is about 193 new members per day. The chart shows 10 weekly subscriber counts.
Top posts on r/Aquariums this week
This week’s highest-ranked posts, in Reddit’s own order (collected Nov 7, 2026).
- Snakehead pair seen guarding fry in a city pondu/ThenAcanthocephala57 · Nov 4 · video
- My pygmy sunfish in the morning vs the eveningu/-Fishmonger- · Nov 6 · gallery
- Happy Wednesday from Ulyssesu/Expert_Snail_ · Nov 4 · video
- My Apistogrammas had babies and then quickly did notu/BCeagle2008 · Nov 3 · video
- Dwarf Crayfish pregnant or sick?u/Key-Nail-1302 · Nov 2 · video
- One of my peacock gudgeons has a directional arrow for a tail spot.u/Crowds_of_crows · Nov 1 · gallery
- UNSAFEZONE Rank22-IAPLC2021u/Some-Handle-4014 · Nov 6 · video
- My Alpine Newt says hiu/HappyClamAquatics · Nov 4 · image
- What type of stock is meant to go in these vertical tanks?u/PuzzleheadedHabit913 · Nov 3 · image
- Some microfauna in my 10 year old 75 gallon tank.u/PaintTheKill · Nov 5 · video
All-time top posts
The highest-ranked posts in the history of r/Aquariums, from 2017 to 2026, ranked by Reddit.
- At this PetSmart the aquarium staff tried to visually explain what you're getting into.u/yovimi · Dec 25, 2024 · gallery
- This Spanish Hogfish at my job will lay on its side to get pet whenever you put your hand in the wateru/lizardlogan2 · Apr 28, 2024 · video
- All the tanks are doing well!u/Sugar_Daddy24 · Nov 18, 2023 · image
- Caught them doing some kind of ritual? Why in the heck would they be doing this?u/poulard · Apr 1, 2024 · image
- Does my barrel pond count?Jan 21, 2018 · 18,153 points · 329 comments · image
- Ponyo, the spinach-loving girl.u/Hygger-Aquarium · May 30, 2024 · video
- Is this normal?u/MiltronB · Apr 16, 2024 · image
- Crab casting spells atop pyramid (srsly, what is he doing?)Nov 18, 2021 · 14,383 points · 856 comments · video
- Shift change.u/Goldoccie21 · Jul 24, 2026 · video
- The aquatics director at my local Petco is INCREDIBLEu/pangoliin- · Feb 29, 2024 · image
What r/Aquariums talks about
Looking at the titles of 696 recent posts (Oct 29–Nov 5), the words that come up most are “tank”, “help”, “fish”, “aquarium” and “water”. Other frequent themes are gallon, betta, advice, filter, algae and question. Recurring phrases include “fish tank”, “planted tank”, “gallon tank” and “water changes”. By format, 32% are images, 30% are galleries and 20% are text posts.
Popular post flairs: Advice Needed (321), Showing Off My Tank (86), Beginner Help (55), Medical Help (46), Identification Request (41), Discussion (40).
Activity and best time to post
r/Aquariums gets about 190 new posts a day. The public archive holds 1,102,189 posts and 7,784,953 comments in total, about 7.1 comments per post. Last week the busiest day was Tuesday (199 posts) and the quietest was Friday (174). Posting peaks around 17:00 UTC and is lowest around 06:00 UTC.
Rules of r/Aquariums
The moderators of r/Aquariums list 2 rules. In short:
- Attacks, derailing, and trolling are not tolerated
- Dead and dying animals must be tagged NSFW.
How to join
Open reddit.com/r/Aquariums and press “Join”. Read the community rules in the sidebar before you post: every subreddit is run by its own volunteer moderators.
Frequently asked questions
How many members does r/Aquariums have?
r/Aquariums has 1,556,455 subscribers (Nov 9, 2026), which makes it the #680 safe-for-work subreddit in the SubMouse ranking. It added 9,856 members between Sep 19, 2026 and Nov 9, 2026.
When was r/Aquariums created?
r/Aquariums was created on Nov 10, 2009, so it has been around for 16 years.
Is r/Aquariums still active?
Yes. r/Aquariums gets about 190 new posts a day (average of the last four weeks). Over its lifetime the archive counts 1,102,189 posts and 7,784,953 comments. In a sample of 696 recent posts we counted 619 different authors.
What is the best time to post in r/Aquariums?
Based on post counts from Oct 29, 2026 to Nov 4, 2026, the busiest day was Tuesday and the quietest Friday, and most posts arrive around 17:00 UTC, with the fewest around 06:00 UTC. More posts also means more competition, so a quieter hour can help a post get noticed.
What kind of posts are on r/Aquariums?
The community describes itself as: “The subreddit for anything related to aquariums! Come here to enjoy pictures, videos, articles and discussion. We're also here to help you if you need advice.” Recent post titles often mention tank, help, fish, aquarium and water. Most posts are images (32%).
Is r/Aquariums SFW?
Yes. Reddit does not mark r/Aquariums as an 18+ (NSFW) community, and its own rules forbid NSFW content. SubMouse lists safe-for-work subreddits only.
What are the rules of r/Aquariums?
Join the community on Reddit first, then use “Create post”. r/Aquariums accepts both text and link posts, with images, videos, galleries and polls enabled. It has 2 posted rules, starting with: “Attacks, derailing, and trolling are not tolerated”; “Dead and dying animals must be tagged NSFW.”. Moderators remove posts that break the rules, so read them in the sidebar before posting.
What subreddits are similar to r/Aquariums?
Communities with similar topics include r/Advice (3.2M), r/videos (26.9M) and r/aquarium (132.3K).
Stats from public data (data updated Nov 9, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026; top posts from Reddit’s public feeds). Point and comment counts are archive snapshots and can be lower than on Reddit today. SubMouse is an independent directory and is not affiliated with Reddit or the moderators of r/Aquariums.