r/Marimo↗
Marimo, the lovely aquatic furballs
Marimo! This subreddit is dedicated to care of the lovely aquatic moss balls otherwise called marimos. Specifically, the traditional form of endangered algae is the subject (Aegagrophila Linnaei), but all moss ball discussions, pictures, advice, or videos are welcomed!
36k subscribers55 posts / mo in Sep 2026 (incl. ~4% by known bots)47 authors / mosince 2013
r/Marimo has 36k members (+48% over the last 12 months). It gets about 55 posts a month from 47 people. Top topics: Moss Terrariums & Growth, Moss Tanks and Watering & Splitting.
When to post on r/Marimo
You've used today's free reports
Visitors without an account can open 3 subreddit reports a day. The best time to post on r/Marimo, removal risk and the rest of the report are one step away.
How r/Marimo has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/Marimo
Top topics
Share of the subreddit's posts
- Moss Terrariums & Growth3.3%
- Moss Tanks0.7%
- Watering & Splitting0.5%
- Baby Animals0.5%
- FishHealthIssues0.5%
Brands people mention
Most-mentioned brands and sites, last 12 months
- Dropbox
- Nature
- TikTok
- Aliexpress
- アメーバブログ（アメブロ）
Everything else about r/Marimo
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research