I myself prefer a water change every week just to keep my tank in top shape and I also test the water before and after a test and it seems to work out. I guess if you are busy and don't have time every week to do a water change than you could do a water change over other week. It's really up to the reefer.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.