As a betta owner, one thing I noticed was how difficult it was to find a great filter for a small tank.
This is a big problem because in my opinion, a betta tank should always have a way to filter the water, no matter how small the tank is.
However, I would recommend never keeping a betta in anything smaller than a 2.5-gallon tank.
I was surprised how little information there is online about mini filters for small tanks.
So, I thought it would be a good idea to provide some information to help out new betta owners, experienced betta owners and anyone who may be keeping any type of fish in a small or nano-sized aquarium.