Not sure how much airline you may need

Lifetime(increased from 5 years)

EarthTec® is non-toxic to humans or fish when used as directed

Optional packages include a post mounted cabinet (4x4" post not included)

Effective aeration can be achieved in 1/4 acre ponds 5 to 8 feet deep

Airmax LR50 Diaphragm Kit For The SW40 Pond Fountains Not sure how much airlineKeep your SW40 Airmax Shallow Water Series Aeration System running at its best with LR50 Maintenance Kit. Over time, seals and moving parts wear and breakdown causing decreased system performance. Airmax Aeration Maintenance Kits contain the parts you need to restore your system to it's maximum potential. Kits should be installed every 6 12 months or if you experience a reduction or loss of bubbles at any of the diffusers to ensure optimum performance.