The smartpond(R) 210 GPH pump is ideal for small decorative ponds with a 400 gallons max volume or measuring up to 3' x 6' x 1 1/2'. Oil-free and energy-efficient, this pump operates at a low noise level. The adjustable flow control lets you manually change the amount of water flowing through the pump, while the output valve adapts to 3/4" inside diameter tubing. Use a smartpond® pond pump to recirculate water in your hydroponic system. Get a 7' x 10' PVC pond liner (model 52517) and a filter box (model 52500) to design a small decorative pond for your outdoor space The pump is backed by a 2-year limited warranty plus an additional 1-year warranty when you register your product online.