I’ve always maintained that a huge part of my own success has been 10% weekly water changes using a high quality salt like Tropic Marin Pro Reef which replaces necessary trace elements used by the tank inhabitants.  Yes, our natural reefs have certain levels of trace elements but do you know what level your tank has after dosing?!  Most are too high which many times results in disaster!  I do not dose as I’ve learned the hard way that dosing is basically playing with a tank’s water chemistry which almost always has negative results over time.  If you’ve got mostly soft corals, even with some stonies, water changes are all you need to do!  Do yourself & your tank a favor & stick to your water changes & don’t skimp on salt quality.  No other salt comes close to the quality of Tropic Marin.  Will it be “Captain Crunch” cereal or “Total” for your corals folks?  ;c)