I purchased a dolphin pump less than a year ago, and it leaks from the seals. I called them and the said there pumps work well on freshwater, but if any salt, or sand gets into they will leak. If you are looking to get a new pump, dont waste your money on dolphin pumps. The label on the pump should read only for freshwater. Even then I would not take the chance. The water destroyed my wood floors, and cost me about $1500 dollars.