Originally Posted by gbose
I'm still a newbie, so this is just a question...
Do you really recommend 100% water changes? I'd read that changing too much water at one time stresses the fish...? maybe 50-80% instead?
Would value your thoughts!
Bad water conditions will stress them more. Bettas are brave fish who tolerate being netted well... as long as you are matching the temperature and pH of the new water to that of the old, there should be no problem. Breeders change the water in their fry tanks daily with no consequences to health.