Thank You folks..I thought the same about the PPM's being too low, so I increased the bleach...I placed three gallons in, waited an hour and retested..I came up with 15PPM...?? This testing was done after the sun went down
Based on the calculator, this amount of bleach (assume 5.25% and 7000gallon volume, and a 9PPM starting point) should have put me in the 30PPM range....??
Now I'm wondering if the bleach I'm buying: Sho-Brite bleach from Big-Lots is actually 5.25% strength..>>> the obvious answer is to "Read the panel on the container"...but this particular brand does not show percentages....
ANyone using the BigLot's bleach noticing a problem with strength of product ??