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This semi-rigid, micro-porous, polyethylene diffuser tubing may be assembled into many configurations using regular PVC fittings and SIL2C clear silicone. This diffuser material produces fine bubbles (the pore size is 20–35 microns, so use a 10-micron air filter) with a pressure loss of about 15" H2O. Can be cleaned with muriatic acid. Very buoyant, so hold-downs or weights are required on this hydrophobic diffuser material. Made in USA.
Note: Diffusers are also known as airstones.