I put about 2 solo cups worth into it. Held for a couple hours, when I went back to check before bed it had jumped a bit more, so backwashed it out. I'm CLOSE to the end of this phase. Shallow end is crystal clear and sparkles, deep end is pretty clear. going to hold it another couple days to see if I can lock it up for good, but am pretty much there. Not seeing FC loss overnight, but haven't done the formal test yet. Still a little bit of brown cloud/settled material when brushing, but really think that's sand at this point vice dead algae. Going to throw the robot in again tonight to make another pass, but pretty sure that's the problem. And will be a little bit before I can take the sand filter apart so willing to live with that short term. Likely also contributing to the slight lack of clarity in the deep end by the drains, I'd imagine. I can see the drains now from my second story window, 25-30 feet away from the pool side, so thinking clarity isn't too bad. But like I said, going to let it keep going for another couple days. Will be gone over the weekend, so hoping that will coincide with the couple days that FC needs to drift down from the 25 I've been holding at anyway, so shouldn't need additional attention during that time. After that, will find out if the salt cell works...
that said: when I'm done SLAM on Friday, should I just let it drift for the weekend, or try and adjust the other values before I leave? Don't want to come back and see it green after all this! Was also going to kick the timer in (on purpose, finally!) so I'm not running 24/7 while I'm gone. Would a couple 4-hour shots be enough, or should I be doing more? What are the best times for that? Assuming peak sun would be an important time to churn things up, and maybe once early evening before the sun sets? Longer, or different times?
Can I do any real testing on the salt cell, or just see if it appears to generate FC by checking the values myself? Or is this one of the things Leslie's may actually be useful for? Can't imagine what they charge for the replacement, but maybe the test is at least of value. Of course, if they are selling them, more likely to tell me I need a new one, I'd guess.
I've definitely got low salt, so gotta do something there before it will work anyway. Automation says 1200ppm, test strips TFTestKits sold me says about 2000ppm. Not loving the wide delta there, but could be the older salt cell not giving great readings, or the strips not being super accurate either, or somewhere in the middle. Just don't want to overshoot, but have to do enough for the salt cell to turn itself on, too. Also still not 100% sure of my pool volume, so that doesn't help. I've tried adjusting it a bit as I've watched the chlorine, but I haven't done strict before and 10 min after tests to really get a good reading of the effect of a bottle of bleach. So far, adjusting myself down from 40k to 35k, but still thinking that may be a little high. Need to do a couple back to back tests, but have been trying to make sure I don't run out of reagent as well considering the condition of the pool when I started. For both salt and CYA, plan was to add half of what I think I need, wait a bit, and retest before adding more. Don't want to overshoot on the chemicals that require draining the pool! rather do it in a few steps, as annoying as that is.
So, that's it for the moment. please let me know what you think of the couple questions/thoughts I threw out there, especially as it relates to leaving the pool alone for a couple days. Thanks!