Yes that is a closed or semiclosed system where I was planning to add aquaponics. I have 1500lbs fish there so could go big with aquaponics, but have determined that my well water may be too salty and has a high sodium hazard. In that system i have two solids clarifiers and a large baptismal (700gal baptism tank) that is packed with corrugated biomedia and aerated before returned to fish.
