I have a 20 gallon Red Sea Max nano and oooo my gosh I tried everything from weekly water changes to daily to even switching salt mixes. Calcium stays between 500-530pm and my alkalinity gets dosed everyday to keep at 9.0. How can I lower my calcium to preferred levels I don’t know what else to do please help. Saltwater I get from LfS has calcium of around 450 and I dose alkalinity with Red Sea foundation A alkalinity.