I mix mine in a 44 gal brute trash can with a power head, I plumbed a 1" ball valve and spa hose into my 2" return line so I could pump the water out without ever lowering any water levels or flow in the tank.I plumbed in a dedicated drain in my fish room that goes outside on the ground,once I pull out x amount of water,I use a drop in pump in the trash can to pump new water back in.