If a deluxe homeowner test kit can't measure chlorine above 5 ppm how can you compute combined chlorine? If the FC is at the top of the scale so will TC. So I will not be able to get a meaningful CC reading.
This summer the chlorine has been pegged for days on end. I've been adding a 3" tab every day or two to the skimmer (let's not debate that now) to avoid last year's algae crisis.
Algae has been in check despite the heavy rains in the last month.
But I smell chloramides when I have my nose near the water. Yet there is no meaningful way to know how much shock to add or even if I should shock considering the apparent high chlorine level.
The pool store can't measure beyond 5 ppm either and half the answers I get there even I can identify as bogus.
What would you do short of buying a laboratory quality test kit? Or do I just shock the pool anyway with a standard dose?