22 is a bit high. Is that what you were aiming for and if so why ??
With your CYA around 40 you should
maintain a SLAM level of 16. Life gets in the way and some times it's helpful to go a little over so if you don't test soon enough you don't drop as much. Little over like 18ppm. The thing you need to understand is that you need to
maintain that level of 16 and hold it there as best you can. If you drop too far under the 16ppm before you add again algae can start to grow again.
Like Richard said earlier and it shows in the chart:
http://www.troublefreepool.com/content/128-chlorine-cya-chart-slam-shock With CYA around 40, during normal operation you want to keep the FC level between 3 and 7, and never let it get below 3.
That needs to be followed after you complete the SLAM to maintain a clean pool. If you add CYA or dump water then you need to recheck the CYA level and check the chart to see where you should be.
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So i just keep testing the free chlorine? Not ph or alkaline
With FC above 10 the pH test isn't reliable and for now all you need to do is focus on the FC and brush the pool daily at least once. Testing for CC would be good as that's part of knowing when you have arrived at the end of your SLAM. Everything else comes next.
This is in Pool School and it's important to know:
SLAM:
Test the FC level and add enough chlorine to bring FC up to shock level (see here for correct shock level)
Test and adjust chlorine levels as frequently as practical, but not more than once per hour, and not less than twice a day. Chlorine additions should be frequent, especially at the beginning. Algae and other organic debris will consume chlorine very rapidly at first. As things progress, you will lose less chlorine each cycle and can add chlorine less frequently.
Brush and/or vacuum the entire pool once a day
Backwash or clean the filter as needed
Vacuum up debris as needed
You are done when:
CC is 0.5 or lower;
You pass an OCLT (ie overnight FC loss test shows a loss of 1.0 ppm or less);
And the water is clear.
When all three are true, you are done SLAMing and can allow the FC to drift down to normal levels.