A betta doesn't poop much.
One betta in a 5g with a shrimp, and a snail, and a few small plants will not need more filtration than a small air powered sponge filter. 50% changes every 7 to 10 days is enough. 2 weeks easy with a 10g.
One betta in a 5g with a shrimp, and a snail, and a few small plants will not need more filtration than a small air powered sponge filter. 50% changes every 7 to 10 days is enough. 2 weeks easy with a 10g.


