In my opinion you should do water changes. Seems that people do water changes
after something goes bad (hair algae, cyno, diatoms, livestock deaths, etc). I try to
avoid these problems by regular two week 10% water changes. Overkill? I'm not sure but I haven't had any problems and I'd like to keep it that way.
Better to
avoid problems than hassling yourself with
fixing problems, right?
