"A rose by any other name would smell as sweet"

I'm not sure if it's soil you have in there, but if it was a potting mix it likely contains soil! Indeed, I doubt that a consensus could be established with ease as to a standard definition for aquaponics. It is a thing, yet it is not a thing!

I do not believe that calling your system by any name adds or detracts from its inherent value as an agricultural technology. Do not let the words of others restrain or limit your freedom or creativity. Build what you must build and share it with the world once you are satisfied it's worth sharing, my friend.