I bought a 10 gallon set yesterday for my son's baby goldfish and it came with an internal filter with the disposable cartridge, it works great so far but I think it would be too powerful for a betta tank. The betta I just bought is in a 2 1/2 gallon with no filter (will do 2x per week water changes), just a heater and thermometer. I have read that in a smaller tank the filters bother the bettas. if I ever setup a 10 or 20 gallon divided tank I will use a filter, probably a canister.
Last edited by Beckylovesbettas; 07-09-2013 at 08:02 AM.