Energy Efficient, Reliable, Nearly Maintenance Free, This style of air pump is what I use to run my personal fish room as well as the retail store.
Linear Piston Air Pump Repair Kits
Linear piston compressor - 80 l/min AC 0901 - Nitto Kohki Europe - air / electrically-powered / AC
$240 Linear Piston Air Pump vs $60 Diaphragm Air Pump
Linear Piston Air Pumps, Pentair Aquatic Eco-Systems
Nitto Kohki USA - Pump Div.
Septic Air Pumps - Wholesale Septic Supply
EasyPro Medo Linear Piston Compressor
Piston Aquarium Fish Tank / Fish Pond Air Pump (100L/Min) ACQ007
MEDO
EcoPlus Pro 100 Linear Air Pump - Aerates Water in Aquariums and Hydroponics, 2200 GPH : Pet Supplies