I have a clear plastic bin, 6inches in height, and instead of filling it up all with hydroton, i wanted to put many pots in it, and filled with water at around 4 inches from the maximum 6 inche depth. Alga would form, no problem, i would have put some alga eating shrimps in it and maybe fish too. New water would come from a 75 gallon aquarium, to a sump, pumped to this growbed, and drained back to sump, then back to both 75 gallon aquarium and the growbed. My hydroponics store let me know that the roots would rot due to sunlight / or light in general. I did not know that. That being said, are there vegetables where the roots can handle sunlight?
I guess another option would be to get pots that are longer in height, and simply put them at the bottom of the tank. I could drill a few holes in them for water to get in and out. May need an airstone inside for more oxygen (i dont know if i do or not). Would like to hear some thoughts. Doing it with pots in the growbed instead of filling the whole container with hydroton would give me more space to have more living organism space such as shrimps (and maybe alga eating fish and snails), whilst still allowing me to grow some vegetables.
thanks in advance