This is a 2-bed version with a filter before the DWC. The fish tank has been redesigned to fix issues with gravity flow into the media beds.
Designed to fit in a narrow driveway, this DIY aquaponic system is built from wood palettes, pond liner and other cheap and readily available parts. Total parts cost is approximately $2300. A 450 gallon fish tank overflows into two flood and drain media beds. Media beds drain through a swirl/radial flow filter into the DWC raft bed. A single water pump in the raft bed (sump) pushes water back into the fish tank. This is a modified CHOP system with the raft bed acting as sump. I've simplified the construction to minimize the amount of time it takes to put together. These grow modules are easy to build from cheap wood palettes with a minimum of cuts using a Sawzall and are joined together with metal tie plates and screws. All modules are insulated from the reflected heat/cold of the pavement or ground with 1" or 2" foam board. An incomplete NFT pipe grow module is included over the raft bed and currently set to 'hidden'.
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