Hey everyone, i have another question. I have a 90 gallon reef tank thats been setup for only about four months now. I have my corals and fish and so far everything is good. My question is, why do people use kalwasser and why does it make so much of a difference than using something like kents liquid calcuim supplements. All kalkwasser does is add calcuim to the water, so why is it such a big thing and regular supplements arnt? My tank has a constant 8.4 ph and a changing 440-500 calcuim. I dont even dose my tank with kents liquid cal anymore cuz my tank always has calcuim already in it I hear all the time tgat dosing a reef tank is pointless if you have a quality salt mix. I have instant ocean reef crystals. It Says it raise cal/mag and other trace elements and keep a stable ph. Why use kalkwrasser when i have an all in one reef salt mix that has all the essential elements? And one last thing, im trying my second attempt at keeping sps, an acropora, and i heard someone say that their sps kept dieing until they used kalkwrasser. Pleaase help me with this im really confused.