Reducing pH and buffering to7.0
New to the forum but already impressed; just can't find what I need in published posts. A bit "out of left field", for my "tank" is a 38,000L (~8000 gal) pond, without fish yet but plenty of water plants: still trying to get the water stable.
Water constantly recirculated through water falls, ozone clarifier & filter but pH is 8.8 and alkalinity is 180 ppm (Is that about 10 KH?) QUESTION: How can I reduce pH and buffer to between 6.5 & 7.0? (RO is out of the question for this size.)