I find with my system over 5000 tilapia.Its best to try
experiment's with new ideas with just a few fish in a lil system and if it don't work I don't have much to loose ? I even use regular compost soil over gravel for certain plants in constant height beds loaded with redworms! Redworms r a must for me in non float raft beds. They keep solids broke down and airrate beds. And if they aren't happy plants won't b happy. Hope this might help you.
