A short, curated guide — not an automatic related dump. Figures come from SubMouse's safe-for-work directory when we have them.
r/Aquariums (about 1.6M members, directory rank #681) is for anything related to aquariums — pictures, videos, articles and discussion. Terrestrial houseplants, indoor vegetable gardens and dog care each fit better when the thread is not aquatic husbandry.
Stay on Aquariums for tank setups, water chemistry and aquatic livestock. Use houseplants for potted indoor plants, IndoorGarden for edible indoor growing, and dogs when the pet interest is canine rather than fish.
r/Aquariums — Aquariums
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.
Houseplants
When to choose it: Indoor plants in soil rather than underwater aquascapes.
Why it is here: Public description: discussion, care and well-being of houseplants (about 3.0M members, rank #357). Neighbouring living-display hobby.
How it differs from r/Aquariums: Terrestrial plant care versus aquarium husbandry.
/r/IndoorGarden
When to choose it: Growing herbs and vegetables indoors.
Why it is here: Public description: tips on growing an indoor garden including herbs and vegetables (about 1.2M members, rank #921).
How it differs from r/Aquariums: Edible indoor growing versus fish tanks.
/r/dogs: Woof
When to choose it: Dog ownership questions rather than fishkeeping.
Why it is here: Public description: dog owners discussing various aspects of dog life (about 2.9M members, rank #377).
How it differs from r/Aquariums: Canine pets versus aquatic pets.
Run the automatic finder for r/Aquariums (results are matched from our directory; that page is not indexed): Find related to r/Aquariums.
Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and culture claims appear only when we have them — missing fields stay n/a. Directory rank is listing order. Communities outside the published Top 100 open in the info tool instead of a full community page. Guide updated 2026-11-07.