I'm following Richards approach to CA scale and am harvesting rainwater. My first test after harvesting revealed a TA of 50 (down 40%). I'm curious as to others experience with rainwater harvesting, asphalt shingles, and the overall effect on TA. Based on the CYA and CH dilution my first harvest replaced 25-30% of the pool water (WOOOHOO).
As always thanks for the help guys!