Again - what method was used to test the pH? I doubt the pH is above 10? Do you know the alkalinity? If you DYI tested the pH yourself, I suggest that you go to the nearest stream or pond (preferably ditch or stream) and test the pH with the same method. What is the result. Readings should be very close to the same.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management