My pool was finished in October of 2015, for the past 16 months I have been using chlorine tabs and other chlorine shock treatments that have sky-rocketed my CYA levels. I have not had any major problems. Water has always been blue. (just some small algae blooms that brushed off the pebble tech and a little calcium scaling) but i have decided to completely stop the tabs per this website and switch to bleach. I have been using bleach for a week and I just received my test kit and recorded the following results. I was trying to get the FC up since my CYA has been high. I did all the tests twice to confirm.
FC 7.5
TC 7.5
PH 7.5
CH 575
TA 140
CYA 120
I have used a local pool store to test in the past and my CH and TA never seemed to be off. CYA has always been high which is what brought me here. Any advice to get me leveled out would be appreciated. Thanks
FC 7.5
TC 7.5
PH 7.5
CH 575
TA 140
CYA 120
I have used a local pool store to test in the past and my CH and TA never seemed to be off. CYA has always been high which is what brought me here. Any advice to get me leveled out would be appreciated. Thanks
Great job on the TF-100. 
Now you see accurately what's happening. No doubt the CYA needs to be lowered. If I were you, I'd do a partial water exchange which is the only way to lower CYA. Easy math - if you swapped-out 1/2 of the water, that would lower CYA to about 60. That's good for summer if your pool gets full sun. We've had a bit of rain lately, so you don't want to lower your water level too much at any one time due to a possible raising water table. But the ideal goal would be to get the CYA down to about 50-60 before you do anything else. The bonus in this is that it may lower your CH a little as well if in the past you used any cal-hypo pool store products. 
