I don't know precisely how high it is. And, as Ben has written in other threads, it is probably one of the worst (or most difficult) tests to interpret in the kit. I completely agree. I've watched the Taylor video to check my assessment but to know exactly when the black dot disappears I find somewhat subjective. I performed the test several times just to be sure and I believe the level was about a 1/16th" below the 100 mark. I also question my testing a bit considering how little bleach it took to clear the pool. I realize my bleach strong but it only took 3 gallons. I find that at least somewhat encouraging.

The way it got so high was that I was using dichlor (from Sam's Club) to shock it. I, for some knucklehead reason, thought my granular was "unstabilized". That combined with the use of skimmer pucks while I was servicing the system combined for a problematic outcome. Personally, I find liquid chlorine (or bleach) a pain. Six back surgeries and a shoulder reconstruction means I generally prefer to avoid such weight. I'd prefer a granular but I don't care for Cal Hyp because of how it dissolves. Since I've found this high test Hypochlorite it takes far fewer gallons to do the job and it's cheap. As a result it is, and will be, my chlorine of choice.

I also believe there is a lesser demand in the cold north. Colder temps inhibit algae establishment and proliferation. I could be wrong but it's a pretty short season compared to the south.

Thoughts?