I am currently growing Hydroponic. 80 Quart Storage Tote, 60 gal per hour internal pump, external fish air pump with a 10″ bubble stick. Only issue is keeping pH stable at 6ish. Would love to hear your opinions of Hydro vs. Aquaponic growing. Goldfish or Guppies…I hear KOI is the best but don’t want to wait for them to grow and they can be spendy. What would be the best way to do Aquaponic? Pump the water into the plant reservoir and just let gravity flow the water back to the fish or pump back into the fish? Do the fish need any kind of water filtering before the water goes back into their tank or do the plants filter it well enough?