these  rugged

The Robust-Aire RA1 system:

Extremely energy efficient magnetic drive

up to 150 feet

The Anti-Splash Mat helps to diffuse water turbulence

ProLake2 2.5 Aeration System 5 Duraplate Diffusers - 115V/230V Power:230V these ruggedProLake2 Aeration System (2) 1 2HP 5 Duraplate Diffusers 115V 230V ProLake2 Aeration Systems are designed to clean and clear ponds and lakes measuring up to 8 surface acres. ProLake2 systems offer two powerful horsepower compressors capable of delivering 10. 6 cubic feet of air per minute to our non clogging, self cleaning Duraplate diffusers. We top it all off with high volume cooling blowers, a programmable timer and fully adjustable, brushed