+ = System Includes 4 100' Rolls of 1/2" Alpine Weighted Airline

Typical operation cost of $3

they come with air filter and 6′ power cord

About The Biosphere Pro: The biosphere pro is unique when it comes to beneficial bacteria products for ponds

Max PSI - 10 psi

Sentinel 1/2 HP Aeration System with 3 Diffusers Select Sentinel Aeration Package:Sentinel with No Cabinet + = System Includes 4Sentinel 1 2 HP System w 300' of weighted airline This 1 2 HP Sentinel aeration system is the perfect, complete kit for ponds up to 3 acres in size. The all new Stratus SRC rocking piston compressor will create up to 4. 5 CFM of air flow while pulling 3. 6 amps. Operational costs are right around $1. 00 in a 24 hour period. The standard system runs on 115v. Optional 230v is available on request. The basic kit (without a cabinet) includes the standard