Hey guys! Still fairly new into having a reef tank and I was just wondering how often you guys do water changes. I have a 10 and 20 gallon reef tank. The 10 gallon is older and I’ve always done weekly 2 gallon water changes and I’ve always had issues with the tank. My 20 gallon I’ve been doing 5 gallon water changes a week but recently have gone two weeks without a water change just because everything looks so happy.