Just plumbed in the 1 HP pool pump , and after diddling with it for a couple of days, things are back to semi normal. I'm way overpumped for the system I have right now, but will be adding at least one more node of 4" PVC tubes ( 3 , stacked and gravity dropping) set along the outside wall of the greenhouse. These will dump into a 10' long 1' wide gravel bed, then back into the fish tank on the west outside of the greenhouse.
Only lost a few plants that I can replace with rooted cuttings in short order.the koi are all happy as clams now they are getting filtration again.......and the water allready started clearing back up after only running for a few hours.
Off to go eat dinner