IAF Replacement Air Filter Element, 1/4 HP Rotary Vane Protective Underlayment The 9 pound size comes

The 9 pound size comes complete with feeding instructions

Meter comes with 4 each 1

20ft 30ft 40ft 50ft 60ft 70ft EX8500 5

When the water is above 60°F you can increase to daily feedings if increased growth is desired

IAF Replacement Air Filter Element, 1/4 HP Rotary Vane Protective Underlayment The 9 pound size comesIAF series filters have a protective metal screen over the filter element. The IAF25F is a replacement filter for some 1 4 HP Rotary Vane compressors and the IAF38F is the replacement filter for some 3 4 and 1 HP Rotary Vane compressors. Please note that Rotary Vane Compressors have been sold with IAF filters and with the plain cork AC393. If it has protective metal, then it is the IAF Filter.