Do not do minor water changes on a small bowl. You must do 100%. Every three days should be just fine.
Yeah seriously. My boyfriend and I bought Bettas at the same time so we put his in a 1 gallon bowl I have so he wouldn't be stuck in the cup for 3 days. He got pretty stressed seeming from the 50% water change I did, I couldn't imagine a complete change.I haven't seen any fish take a 100% change very easily. Isn't that why we acclimate new fish?
I know how these cheap little tanks work. You buy a cheap little tank then a hood, then a light, then a filter, heater, gravel, then you have to cycle it. By the time you do all that you are already at $50. Plus if I wait to cycle a tank my betta might die by then. Am I missing something or doing something wrong? Is there a cheaper way?