Ok, by pool math I should be at 27. I was inside when I ran the CYA test so no sun but I did hold it at waist level and look down the tube. My FC has been bouncing from about 5-10 over the last couple days as I’ve been adding LC. That is good to know that those are minimum numbers in the SLAM chart. We’re not swimming this season, it’s 80 out today but the water is 68 degrees. So I’m using this time until we close to learn without any pressure Thank you!If pool math for your concentration of liquid CYA should have taken you to 30, then I would assume it has done that. You can deal with the art and science of reading that black dot later, after you've killed all your algae. Proceed with the SLAM. BTW, going forwared, quite a few people here regard the top of the suggested range for FC as both a target and minimum. These are people who don't want to SLAM. I'm one of them. If the table says 4-6ppm FC, then I shoot for 6-6.5 all the time. Remember FC under SLAM level is safe for swimming--although the water temperature soon probably won't be suitable for swimming, even there in the "south" of Wisconsin! However, if you have an integrated spa and a heater that can heat just the spa, that could work in winter (yeah I know...big talk from some guy in southeast Texas!)
BTW, did you know how to read that dot? You stand in the sun and hold the tube in your shadow at waist level.
I'm off and slamming! I've been at SLAM+ FC levels (12-15) since yesterday afternoon. Slight problem though. I don't think my pump is running 24/7. My mechanicals are only half setup right now so I haven't gotten the official tour of the system yet. The pump is definitely running during the day but I think it might be programmed to shut off at night and I have no idea how to change that. Will that make all of the rest of the SLAM process useless? I've also been running my dolphin m400 robot. I think (because I can't see it) that the bottom of the pool is quite dirty with leaves and sand from construction.If your ready to start the SLAM then add enough chlorine to get up to 12 ppm. Filter should be running 24/7. Check chlorine level 30 minutes after adding to see if you hit 12. Just do the FC test.
Thank you! I will try your tips and that is good to know that I should really only be glancing at it. I was definitely giving it a deep stare lol.Took me a bit on the CYA test. Here are tips I've learned
1) You have about 5-10 minutes where you can try the test and pour back into the bottle and try again.
2) You fill to each line, look, fill to next line. There are no CYA numbers that don't end in 0.
3) Try inside in light bulb light. Try outside, bright light, sun to your back (doesn't have to be full sun, just do it outdoors). You will find your number is higher in outside in bright light. It brings out the turbidity. You should test outside, sun to your back, waist high. Test it yourself...try inside with light bulb and outside. You want that higher number you will get outdoors.
4) GLANCE at the dot. Don't stare. If you see dot at a glance, fill to next line. When the dot is obscured at a GLANCE, you are done. If you stare, you can juuuust see outline, but at a glance you cannot, you are done.
I did fill/shake/rinse the jug multiple times after I poured it all in so I'm pretty confident I got it all. Yes re speedstir, the first test I did without it but since then I've been using it and OMG it makes ALL the difference in the ease of testing!!!Going forward if you only need a partial jug of CYA then do not use liquid CYA but resort to the granular. The CYA in the jug settles to the bottom and needs to be used in one shot rinsing again and again to get it all. While in slam do not check the PH as checking it with FC above 10 obscures it accuracy also no checking of the CC either as it irrelevant at this point. Keep the slam level up as much as possible since FC below slam level doesn't accomplish anything. Not sure if you purchased the speedstir with your kit but I highly recommend you get one as it makes testing more accurate and simpler.
It is likely an area that doesn't get good circulation. Likely dead algae. Run your dolphin and that will mix water as you are filtering and will take out some of the dead algae. Do that and brush brush brush. It may take a bit of time with Sand Filter, but it will get there.Pretty much every morning I’ve come out to my steps looking like this (attached pic). It is not gritty and it poofs when I go to touch it so I think it’s dead algae? But it still makes me wonder if my pump isn’t running 24/7 giving the sediment time to settle. Or is this par for the course? I’ve been manually vacuuming the steps and letting the robot do the rest. Maybe I should put the heavier duty filters on the robot next time. Thoughts? TIA
Does vacuum to waste mean use the dolphin? So turn the pump filter off. Let everything settle and then throw the dolphin in with the pleated filters to pickup all the dead algae on the bottom. Correct?The pleated paper looking filters are what you want to use. They may get clogged up very quickly.
For the next couple days I'd try leaving the filter off at night & vacuum to waste in the morning. If your work schedule doesn't allow that then turn off the filter before going to work & vacuum to waste when you get home.