Fish Mate Pressurized Bio Pond FilterThe 3000 PBIO Pressurized Pond Filter is here to keep your fishy friends happy and healthy by keeping your pond water clean. Perfect for ponds sized between 750 and 3,000 gallons, this Fish Mate pond filter uses a combination of mechanical and biological filtration, with the aim of optimal water quality and, quite simply, healthier fish. So, if you feel you need assistance with keeping your pond clean, look no further! Patented Powerclenz automatic