Okay, so I've been SLAMing the pool for 2 days now, keeping the FC at 10, checking ever 2-3 hours and bringing it back up as needed. Thursday night my FC went from 10-6ppm, but my CC is at .5ppm now. It continued to go down yesterday (very sunny day) and I continued to put in chlorine. Yesterday I noticed some dead algae in spots I had missed brushing before (certain spots on the ladder had the white slime-like algae on them) so I cleaned things up again very good. Last night I tested it before I went to bed, topped it back up to 10 FC, CC still at .5ppm, and went to bed.
This morning I tested it and my FC was back down to 6.5 FC, CC still at .5ppm. I've had my filter/SWG (at 100%) running 24/7 for the last 7 days or so. So the question is, when will I know when I'm ready for the OCLT? If my SWG is pumping in chlorine and I'm still losing 3-4 ppm each night, if I shut it off, seems like it'd go down even more. The test says it can only go down 1ppm. Is there any point in time when I should test that, or will it be okay to shut off the SWG at night each night and test it until it passes?
I'd like to reiterate that the pool looks really clear and inviting. Before I even got the test kit in to start the SLAM process, my roommates were telling me I had done a good job clearing it up. I had to inform them "thanks, but I haven't actually started doing anything yet". I'm thinking it should be done by tonight or tomorrow night at the latest, but I obviously want to make sure of it so it doesn't come back. If I continue to lose 3-4 ppm each night, could it be that I have mustard algae or something that requires a higher FC to kill off? Should I try SLAMing it with a higher concentration to make sure it's cleared up?