Air Diffusers available: 6" Straight Air Diffuser 7" Diameter Round Air Diffuser Air Diffuser Kit 6" Straight Air Diffuser (Shown above) - AP14570 16 in2 of active surface area Recommended tubing sizes: 1/2" or 5/8" Diffuser stays down easily by filling supplied nylon bag with gravel (gravel not included) For Use with Pondmaster Air Pump AP-20 or AP-40 7" Diameter Round Air Diffuser - 14580 48 in2 of active surface area 18" total length Recommended tubing sizes: 3/4" or 1" Diffuser stays down easily by filling supplied nylon bag with gravel (gravel not included) For Use with Pondmaster Air Pump AP-40, AP-60 or AP-100 Air Diffuser Kit - 14575 6" Straight Diffuser 20' of 5/8" tubing Also includes 1/2" barb connector and 1/2" barb plug For Use with Pondmaster Air Pump AP-20 or AP-40 Diffuser stays down easily by filling supplied nylon bag with gravel (gravel not included) Recommended tubing sizes 1/2" or 5/8" Owner's Manual PondMaster Diffuser Kit Owner's Manual
