FWIW I don't believe in heavy water changes on a reef tank as is the case with a heavily stocked FOWLR
. I have had better luck with only changing 5-10 percent every 4-6 weeks. I have softies and LPS
. It seems like the more I forget to do water changes, the better everything does. Counterintuitive. I know.
And a 15 gallon evaporation rate weekly on a 55 sounds like an auto top off system might be crucial to success in your reef. Your salinity is going to fluctuate like crazy and make it hard to establish stability for growth.