My turn to ask questions

[KLHink]

Three days over 12 ppm, three nights over 15; and we can make out the pattern on the bottom of the deep end and the main drain is now visible. My Dad can see it with his good eye and is beginning to believe in the system, in spite of what it "cost". Thanks very much Dave S. for your help thus far. I am hoping to get the ph out of minimum range next.