My alkalinity is OK for now (close to 50 ppm),my pH is 8.4-8.8 depending on the time of day. Mostly lm just filling my head with all the info about water quality I can. And I understand that alkaline water and alkalinity are two different things. My local fisheries biologists says that the high pH must be do to lime in the water source. I'm not sure he's right. Just looking for right answers!