Thank you for answering. First I did 30% every other day, after I made 50% every other day. But later I read about 100% daily change for small bowls, and was totally confused.
Of course your tank is much bigger.
Thank you for wishing luck. I have never had Aquarium before.
Great your Betta is alive and healthy! He is lucky guy. Hope his fins will heal 100%. I wish mine could hold on untill larger tank(5G) with filter, heater and plants. I know 5G is not much but at least a hope for survival. I worry all the time now while they (I have two Bettas)are in small containers. Though I try to keep them warm (keeping room temperature), I was very confused about water changes.
Maybe you could recommend what frozen food is better and more safe? I want to start feeding them frozen food but do not know what to get.