i saw a pump at lowes, it was a pond pump, pondmaster i believe, i have a gift certificate to lowes and don t have anything else to waste it on. would like to get a new return pump for my 50, 24g sump, forgot the model and all that i think it does 380g/hr 0' head. would that be a good number to shoot for?. would pond equipment hold up in saltwater, any metal peices that would rust or somthing ???