So my systems up and running , but with only one growbed
Im looking for any suggestions of what I could use ( food grade obviously ) as a container to mount above the main tank as my second growbed
Needs to be square sided as Im going to be partitioning it to incorporate a flout mechanism . This way once the top bed is full it will rapidly drain into the tank , thus that rapidly overflows into the main growbed , quicker than the small holes in the main growbeds standpipe can handle , ensuring a good flood
the main growbed is 350 litres , from someones calculations that I read , gravel takes up 60% volume , thus I need 140 litres to flood it .
So the top growbed containerr that I need would have to be between 200 & 300 litres ( the partition for the flout will be 100% water volume , so it doesnt need to be as big a growbed as the main one )
Im tempted to try to make a container myself , either with wood & pond liner , or acrylic / glass cut & glued , but if anyones got a suggestion as to where Id get a nice rectangle , flat sided , food grade container then I'd go for that rather than mess around building something . Minimum lenth of the longest base size needs to be 90 cm aswell , so it can sit on top of the tank
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