I just read the oclt section how to perform. It didn't really answer my question directly so I thought I would ask.
Does the oclt need to be done at an FC of shock level or can it be done from any FC level? The directions say to just test it after no sun and at least 30 mins after chemical additions in the evening. Doesn't say it needs to be at or above shock.
I am just wondering because I was thinking of letting my FC drift down to normal levels today and test tonight then in the morning. I just wasn't sure if the test would be as accurate at let's say FC of 7 tonight vs an FC of 18 for my shock level. Just wondering, maybe it doesn't matter.