I have a gunite pool that is 8 years old. My alkalinity is so high that my pool guy has suggested draining about half the water and refilling. I have drained the pool down about a foot and a half, but the pump has stopped pumping water out. I was wondering if I need to adjust my valves to open the drains vice the drains and skimmers so that the remainder of the water will drain. Hope the question makes sense! I'm afraid to try too many things without some guidance! Thanks for any assistance!