1. For my 5 gallon tank, I bought a Tetra Whisper meant for 1-3 gallons. I figured since bettas don't make a lot of waste, it would be better since it wouldn't be as strong. Anyone have any experience with these filters? Yea or nay?
2. My 2 gallon tank that has my boy in it is unfiltered. How often should I change the water, and how much? I'm thinking 50% twice a week?
i have the same filter for my 2.5 gallon tank...ive only had it 3 days but it seems to be working well....ive heard other people say they only lasta few hours but mine has been going strong for 3 days and nor problems yet!!
From my experience with uncycled tanks, you NEED to do 100% changes or the waste will build up. Being a super clean freak I'd do them twice a week on a 2 gal, but testing your water for ammonia with a good liquid test kit (I recommend API) is really the only way to be sure that your maintenance is up to par.