I recently found a bunch of carp fingerlings in our pond (well more like a puddle in the swamp). They have no chance of surviving the winter so l decided to catch and transfer them. I have 13 of them in a 40l fishtank in the house, but there are still about 30 in the pond.
I was interasted in aquaponics for a while, and now l happen to have the opertunity to try it out. In my greenhouse there is a ~1m2 space thats always in the shade, nothing grows there. I will put the ~500l fishtank there, maybee eaven 2 250l, and make one part of the bed aquaponic.
My question is this. As l understand, a growing medium is required that has as much surface area as possible. People use gravel or clay puffed balls, but l was thinking, wuldnt charcoal be ideal?
I guess there might be a problem with pH. Any guesses?