We are not doing an aquaponic system but we are raising fish. We bought fingerling catfish and some bluegill and we lost a lot of gills. It may have been too early in the year or the temporary tank we put the bluegill in was too small. We had Koi and goldfish in there bur they did fine. Anyway, we went fishing yesterday for some more gills because it is too far to travel to get more and I don't want to waste any more money on them. I put an old trash can on the back of my pickup and headed out to the river and as usual we caught a bunch of bluegill under "keeper" size. We put them in a bucket and then transferred them to the trash can to keep them breathing. No floaters yet and they are bigger than the fingerling you buy. We used a number 10 hook and red-worms. We put them in one of the bigger pools this time. Also got my cement block pond fixed. It no longer leaks...and it was cheap...like me. I painted the whole thing with clay kitty liter mixed with water. Then I threw some sugar sand on top of it. It worked! I now have a pond to store water and grow plants. I will put a couple of goldfish in it too keep the bugs down. I am glad the miracle grow helped. Right now i raising some arrowhead (Saggitaria Latiflora) from seed.