I only use. SALINITY made by Seachem. It is awesome, and mixes very nicely. The magnesium level in it is suoer high and I never have to dose it. My tank stays at 1500 mag just from water changes. I pay about 90 bucks for their big bucket of salt, ya that may seem like alot but it makes 225 gallons of water at 1.026 salinity versus the other brands that may be cheaper up front but will not produce that many gallons at 1.026 I get mine at Preuss Pets, not many other shops have it though. I highly recommend giving it a try.