Complete Air Filter for Stratus Rocking Piston Compressors Beneficial Bacteria (Koi Ponds & Water Gardens) Dosage Rates: Rates range from

Dosage Rates: Rates range from 2

Fountain heads can be installed under water (nozzle tip must be exposed) or externally

Small Basin measures 26" x 26" and is 12" deep

water pumps

1-1/4" Check Valve Assembly

Complete Air Filter for Stratus Rocking Piston Compressors Beneficial Bacteria (Koi Ponds & Water Gardens) Dosage Rates: Rates range fromThis is the complete air filter used with Stratus Rocking Piston Compressors. There was a switch over in 2013, so be sure that yours is this style rather than the former ERPA. The complete filter includes 1 each ERPF12E air filter element. Dirty air filters are the biggest cause of compressor failure. We recommend replacing air filters every spring and fall.