We planted our first aquaponics crop of tomatoes, spinach and celery. I would appreciate any feedback to the following outcomes.  Aquaponics unit: "Barrelponics" built from 3- food grade 55 gal barrels, 15  very healthy gold fish occupy one barrel on it's side, wellwater with perfect ph, 300 GPH Marine AC pump, washed pea gravel media in 2 1/2's of a 55 gallon barrel. Planted 3/15/2014: Tomatoes…