Questions - through the SLAM process do i need to re-check my CYA at some point to make sure i'm maintaining the right FC shock level? I have calcium hypo-chlorite 73%; is it ok to use this or should i stick with household bleach (6 or 8.25 %)? once i have not lost more than 1 ppm overnight, my CC is .5 and water is clear what do i do then? i.e. do i turn my in-line chlorinator back on? And, if so, what setting on a 5 dial? Or, should i just continue to maintain FC with household bleach?
Hello and Welcome to TFP!
You do not need to recheck the CYA level. The only thing that will change CYA is drastic changes/ replacement in water. As an example, 10% water change is about 10% change in CYA. You usually don't exchange that much water during a SLAM to worry about it.
Continue to use plain, unscented bleach to add FC. This is the best method.
It's likely too early to do a OCLT. But once you pass the 3 criteria to end the SLAM, then you go into the daily maintenance mode. You can let the FC naturally drift down. Maintain FC per the CYA Chlorine Chart ( link in my sig). We recommend not using the inline chlorinator, but instead use the bleach. If you use the solid chlorine tabs, you just add unneeded CYA again. You could use up the Cal-Hypo if you pay close attention to and keep the CSI below 0.3 so you don't have scaling issues.