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RTF bottom drain
RTF bottom drain in your water garden koi fish pond is not such a mystery anymore… Pond H2o offers two main filtration options with your pond. Pump fed and Gravity fed filter systems.
Gravity fed pond filter filtrations systems system utilizing a RTF bottom drain is preferred with a larger pond and needs to be built into your pond from the beginning. This method is preferred to reduce overall maintenance. The idea of the bottom drain is that it uses gravity feed to draw water and mulm (the proper term for pond dust) to the filter system. Bottom drains do not pull solids off the bottom, they are designed to remove organics from the pond and create a unique dynamic in the pond’s circulation system. Ponds rely on beneficial bacteria colonies to breakdown fish waste, and other organics such as leaves, pine needles, pollen, dust and all other forms of water logged debris that typically settles to the bottom of a pond. Determining what size bottom drain is best for your water garden for optimal flow rates and proper use of aeration complements a pond drains ability to function properly.
Most will require 3″ or 4″ drain. 3″ drains should optimally have a max flow rate of approximately 1800 gallons per hour and will service an 8′ diameter pond bottom nicely. 4″ Gravity Flow Bottom Drains should optimally have a max flow rate of approximately 3600 gallons per hour and will service a 10′ diameter water garden bottom nicely.
