Pawfly Airline Tubing 6.5 Feet

Pawfly airline tubing is a single length of 6.5 ft clear PVC hose in the standard 3/163 size, with a 4 mm inner diameter and a 6 mm outer diameter. That fit matches the outlets on nearly every hobby air pump, check valve, air stone and sponge filter uplift tube.

When a short roll is enough

Many setups only need a few feet of line: pump on a shelf, check valve, then a drop into the tank. A short roll is handy for a single nano tank, a quarantine tub, or replacing one old line that has gone stiff and yellow. If you are plumbing a whole rack, a longer roll such as the Penn-Plax 25 ft tubing saves you from buying several packs.

Material and feel

The hose is made of pure PVC with a thickened wall. Pawfly describes it as flexible, scratch-proof and kink-resistant, so it can bend around a cabinet edge without pinching the air flow. The smooth inside surface also resists sediment build-up when the line is used for a small siphon.

Other uses

Beyond aeration, a clear line is useful around the hobby. You can run it as a drip line for acclimating new fish, a tiny siphon for spot cleaning, or a feed line in a hydroponic tub. The maker also mentions use with CO₂ systems; for a pressurized CO₂ setup, check that your regulator kit is happy with standard PVC line.

Fitting tips

Cut the hose square with sharp scissors so it seals on each barb. Warm the end in hot water for a few seconds if it is hard to push on. Always fit a check valve between the pump and the water, and leave a small drip loop below the pump so any condensation runs away from the outlet.

Care

Clear PVC can grow a thin film of algae in bright light. Swap it out when it clouds, or choose black tubing where the line runs through a lit tank.