I just use two brute trash cans.. one for salt mixing witch contains one power head, heater and a float to shut water off when its full. I just throw my power head and heater in the can and let it mix for two days before I put it into tank. the other can is pure ro di
water witch is top off
50 gal reef,sump,reef octopus 110,solar flare 108 watt, carbon gfo duel reactor.