Perfect. I haven't had algae in a long time. So I will perform the OCLT, then SLAM.
If you still see no algae, then no you won't. You will have dodged a bullet on that one if you pass. But go ahead and make sure you have a good FC level based on your current CYA according to the FC/CYA Levels. Give yor pool some extra love today with a good brushing and such. Do your Overnight Chlorine Loss Test this evening, and let us know how things turn out tomorrow. Good luck!If the OLCT test comes back where I'm not losing anything, will I need to SLAM regardless since my FC is so low?