Just wanted to thank everyone here for the information and guidance I found on these forums. OCLT was zero last night so apparently I am finished my first SLAM after getting an algae outbreak from a SWG failure (stopped generating chlorine even though it tested good at the pool store!) a few weeks ago. It's been mentioned in a few posts but I think it should emphasized that you need to clean out behind any pool lights when doing the SLAM, not checking this cost me three days. It's been over a week since worrying about anything else than chlorine and CYA it's now to get the levels back to where they should be. And for those of you who are in the process of do a SLAM have patience as it can be painfully slow and remember it will work if you follow it correctly.