Ch - None showing on the test, I can't get the color to change at all
PH - 7.5 (could be a 7.6, kinda close)
Alkalinity test - 140ppm
Calcium hardness - 420ppm
CYA - 100 or above, the test doesn't specifically state what it is above 100
so my issues are obviously two fold. first off, the chlorine isn't showing. i use the puck chlorine in a floater. it doesn't really seem to be reducing much. i put a 3 inch tab and after about 2 weeks there is still a good part of it left.
i had some issues last year and had to have my pool partially drained (3/4th's or so) and refilled. this was back in july of 2014 or so. how can i get my CYA down? i've read that you may need to refill the pool to get cya down but it just seems strange that i would have to drain/refill the pool twice in less than a year. something else must be happening or that i'm not doing.