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.
Nitto Kohki USA - Pump Div.
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Linear Pumps – Air Pumps Online
270: LPH45 Linear Piston Air Pump Review and Plan for Fishroom - Update Monday
EasyPro ML45 Linear Piston Compressor – 45 Watts, 3/4 Outlet – PONDS PLUS Water Garden Center
Coralife Super Luft Pumps are not your normal everyday air pump. Designed for durability, each unit includes a magnetic piston pump with removable air filter, 4-outlet metal and 6-outlet plastic adjustable valves, vibration-dampening rubber base and powder-coated aluminum housing. Perfect for deeper aquariums, high-resistance or multiple output applications.
Coralife SL-65 Super Luft Air Pump
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Linear Piston Pumps
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Medo LA-60B Linear Piston Compressor - 2.7 cfm : Pond Air Pumps & Accessories : Pond Supplies & Equipment