But yeah pump has been on now solid for close to 48 hours. I usually turn it off at night and run it only during the day from about 9:00AM to 7:00PM.
Set back with chlorine levels
- Thread starter Toad_stools
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120 is slightly above range and that’s what it will do to ya. Knock it down with MA and let the PH climb again before hitting it a second time. Each cycle should drop you by 10. At 100 it will settle in on its own to wherever it wants to be.
How much MA do you add to lower the TA and pH? I’ve got about 3 litres sitting around in my shed.
Pool math says 49 oz of 31% / 20 Baum for 120 TA, dropping from 8 to 7.2. Plug in whatever strength you have if it’s different.
So just to be clear on the process, 
You spike the PH down and it drags the TA down 10 with it. Let the PH rise again and the TA stays put while the PH rises. Spike the PH for a second drop of 10 with the TA and you’ll be at 100 and well within range. 110 might work ok but it’s easy enough to get to 100.
You spike the PH down and it drags the TA down 10 with it. Let the PH rise again and the TA stays put while the PH rises. Spike the PH for a second drop of 10 with the TA and you’ll be at 100 and well within range. 110 might work ok but it’s easy enough to get to 100.
- Feb 6, 2015
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pH will read falsely high with FC 10 or higher. That's one of the reasons we recommemd lowering pH to 7.2 before starting a SLAM. Don't concern yourself with other parameters during a SLAM. once you successfully pass all 3 criteria and you FC falls below 10 you can adjust pH. Unless you are in a hurry to lower TA, just leave it as it will probably lower slowly with each acid addition.
For now, focus on the water being perfectly clear with not visible algae anywher, pass the OCLT and have a CC of 0.5 or less. Then let the FC drop below 10 and then adjust other parameters.
While you are waiting, test your fill water if you haven't already. Don't test fill water for CYA as there won't be any.
For now, focus on the water being perfectly clear with not visible algae anywher, pass the OCLT and have a CC of 0.5 or less. Then let the FC drop below 10 and then adjust other parameters.
While you are waiting, test your fill water if you haven't already. Don't test fill water for CYA as there won't be any.
Things look good. A added a titch of MA last night and today the pH is spot on 7.5. FC dropped 1 overnight. I started to let things come down through the day today and FC currently at 15. I’ll turn my SWG back on pretty soon and cross my fingers. Water is clear as clear can be though. It’s a hot sunny day here again so def will stay on top of things.
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clambert1273
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- Jun 13, 2013
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No but ph test will read high with fc over 10 so wait until you are at maintenance levels to check itI just donated another 20.00 which I figure is good for another 20 questions!?. Ha ha. So here’s number one: does shocking raise pH? Mine is now up to 8.0 from 7.4 when I started the SLAM.
To keep on top of this in the future I would love to hear from anyone out there about generally how you manage your SWG in the really hot sunny days of summer?
I thought I had this kind of figured out but maybe not. We typically get to max 33 degrees on hot days here. So that’s about 91 F. Up to now we’ve been in the 20s, but the last week it’s gone up to 30 plus on a few days, which early for this time of year. I generally run my pump from about 9 AM to 6 or 7 PM with my SWG output at about 60%. It seems to be a good balance until the weekend, when temps went to 32. I increased the output slightly to between 65 and 70 but things took a nosedive anyway. There’s also just been tonnes of pollen this year and it’s been so dry that some of the trees are losing leaves from stress and so there’s been lots of junk in the pool, which I clean religiously but still can’t keep on top of it all.
Should I be turning the generator up more on these hot days? Run pump longer? I don’t know what went wrong. I do think I was not at the target FC as well. It was closer to 4 over the last week and my CYA is 65, so I think I do need to try to hit more around 5 for FC all the time. I thought the breaker had tripped on the weekend but that was not the case. Just seems like the SWG couldn’t keep up. Thanks all.
clambert1273
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- Jun 13, 2013
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Well for me, we get 110-115 regularly in summer last year was my first swg run and what I did was raise my CYA to 70 then added liquid chlorine to 5 then set my swg at about 30% to maintain my target. I would test it every morning & adjust as needed or pour chlorine if needed... this yr I have a better idea on how I want to run it so I may push my CYA to 80 cuz it's brutal here in the summer, my vsp pump runs 24/7 just easier for me that way
So you’re also supplementing with liquid chlorine throughout the summer? Is that common with a SWG?
Also, the thing that I don’t quite get is that it’s recommended to hit about 70 CYA with a SWG but if things go wrong and you have to slam then you have to drain water to get the CYA back down. I don’t know. I mean I get having the CYA a bit higher helps to maintain the FC target but if things slide I don’t won’t to be draining water where I am to lower my CYA for a slam.
clambert1273
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I don't often only when needed, im in a much harsher climate than you are in the summer lol I haven't had to slam my pool in the summer when CYA is at the highest, where I am my CYA will slowly lower on it's own so by the time we are ready to let it go dormant for "winter" my cya will be in the 40-50 range.
- May 3, 2014
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Here in Southern Nevada, our daytime temperatures range from 105-125 F during the summer. Overnight temps of 90-100 F. Our pool water temperature will be around 88-92+F. I find with a CYA of 70-80, I lose about 4.5 - 5 ppm FC per day. I lose about 10-15 ppm CYA per month. We evaporate about 1" of water per day from the pool. I run the SWCG during the time the sun is on the pool, 9am to 5pm. I have a very oversized SWCG for our small pool. By design.
clambert1273
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Yup my swg runs the 24/7 with my pump so that I can keep lower output but adjust up if needed
Oly
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How often are you testing your FC levels before and during peak season when demand is constantly rising?
That’s too hot for me friend. Keep that heat down there.
clambert1273
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Mine is just as bad if not worse sometimes but you caN keep the cold too lolThat’s too hot for me friend. Keep that heat down there.
This is the first full season I’ve had my pool so I’m trying my best to figure this all out. Thought I had it then huge fail
. We got the pool installed at the end of last summer, which here for swimming is early Sept. so we had the pool for swimming really only for two weeks last year, and then the pool company that installed it opened the pool at end of April, which is probably too early for here, but we have a heater so we had it cranked for the first month. Now we are having an early summer with hot temps (hot for here anyway). Edit: I didn’t really answer your question but before the weather got hot I was running the SWG around 50% for 10 hours a day and the FC was consistently 4.3. Then when it turned hot last week I turned the SWG up to about 60% and for about the same time period, but that’s when I ran into problems. But the air temps increased about 8 degrees and lots more swimming. Plus here where we are so far North the UV really increases in the summer because the sun changes position in the sky so much between April and June. It’s pretty low in the sky up until mid June.
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- May 3, 2014
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I find the best way to manage the SWCG is to think of it in how much FC it generates each day. If you fill out your signature, we can assist you in doing that calculation. Poolmath does it for you in Effects of Adding Chemicals. I track that information in Poolmath and I can pretty much predict when I need to adjust the SWCG settings.
Oly
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If my pool tests at 4.3ppm FC it commands attention no matter what time of year. During the spring and into summer I want to be sitting at 7ppm and I dial in my SWG to keep it there. If I drop below I bump with liquid and increase my run time and or % generation. I want to err on the high side. I am running at 10 hours per day during the day and at 50% now.