I have gone thru two Rios in the last year using them strictly to mix my new saltwater. My local fish store recommended a CAP-1800 made by Aqua Clear Aquatics. It has lasted around five weeks and is now causing by GFCI to kick off as soon as I plug the pump in. Hopefully they will take it back for an exchange when I go in tomorrow. :?: What type of pumps do some of you use? I basically mix around 15 gallons of saltwater at a time.