For Ponds or Water gardens from 300 gallons up to 1500 gallons. Mechanical Filter to remove solids. Biological Filter for bacteria growth. 9 Watt Ultraviolet Sterilizer to kill free floating algae. Quiet, efficient fountain pump. Includes 4 water feature attachments with ball leveling device. 15" Long x 15" Wide x 6" High with 25' Pump and UV Power cables. (Run UV only when needed).