REEFE RTF2000 Submersible Bio-Filter This submersible biological tray filters help maintain a clean and healthy pond by providing a large surface area for beneficial bacteria to grow and reduce pond waste. Prevents pump and fountain heads from clogging up with unwanted waste and residue particles. Threaded hosetail fittings included. Easy access for cleaning. Compatible with all REEFE RP and RFK series pond pumps. Pump Not Included Code Description/ Size Max Pond Size Flow Suction Outlet Size 9550 Submersible Bio-Filter RTF2000 305mmX254mmX115mm 2000L Optimum 1500L/Hr Max 4000L/Hr Hosetail ¾” Suitable For Max. Pond size over 50CM deep, partly shaded Max. Pond size if full sunlight, over 50CM, average depth Max. Pond size od shallow pond under 50CM average depth, partly shaded Max. Pond size if in full sunlight, shallow Max. Pond size with fish in full sunlight, over 50CM average depth Pond with fish in full sunlight, less than 50CM average depth 2000L pond 1750L pond 1750L pond 1250L pond 1250L pond 750L pond