Is it bad to do a water change every night? I've been doing it to get rid of the tannin in the water i put in there.. I've been doing about 20% changes every night is this bad
I do water changes every day, (or every other day if I'm feeling lazy) as a general rule.
And especially if you have soft water with a low buffering capacity, it can help keep pH from fluctuating and the other tank water parameters stable.