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Contents include basic principles behind biofilter systems
The Collapsible Weed Rake is a professional grade aluminum rake designed specifically for lake and pond use
and all without using any costly electricity
A reliable backup air source during household electrical power failure
During biological filtration
Low Cost Venturi S4 Contents include basic principles behindOur venturi fittings were engineered to entrain the greatest amount of air with the least resistance to water pressure. When pumping water, these may be used to draw in liquids or gases, including low strength ozone. Made of PVC with standard slip connections. Venturi 4734 is fiber reinforced plastic and has male slip ends. Made in USA.
