Leader Ecosub 420 Submersible Pump 1/2 HP 3960 GPH Leader Ecosub Submersible Pump 1/2 HP 3,960 GPH is a multi-purpose submersible pump designed to circulate water in all types of tanks, reservoirs, hydroponic and aquaponic systems Suitable to pump clear water containing particles with diameter up to 1/4 inch Other features include wear resistant shaft and impeller