I know it may sound crazy but no water changes and yes evey test comes out good. Although I think that having alot of live rock makes a differance. Water always goes through cycles there for water will test a little differant everytime. If you have a tank that is over stocked with fish then you may want to do a water changes. My fresh water tanks are way over filtered. like my 125g tank. I have 2 marineland bio wheel filters each one does 90 gal
and a marineland 350 which does 100 gal
. No water changes works for me. And it may not work for someone else. Water changes with sw
tanks seem crazy to me. Adding new water with the exact salt levels with whats in the tank now. When the water evaporates the salt doesnt go with the water it stays in the tank. So do you account for that when making new water? I just add distilled water. All my levels are good.