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Well, we can add another data point to the FC crash after calcium chloride addition study. FC tested 7.5. Added 11 lbs calcium chloride. Knew enough to check FC an hour later. FC was at 5.5.

My pool has turned green and I don’t know why. My pool store says my levels are perfect and my test strips agree most of the time. Test results from the fancy machine at the pool store show my CYA is around 100 or so and the pool store guy said that’s good. I keep my FC at the perfect 1 to 3 ppm...

Totally happy with my new Maytronics Active40 vac but has anyone figured out how it determines that the filter is full? When I open it up to empty it there’s barely anything in it. Is it timing related? If so, how does it determine that it’s been cleaned out and remove the ‘full’ indicator?

Are calcium chloride ice melt products like this a good choice for pool use? https://www.homedepot.com/p/Snow-Joe-20-lb-94-Pure-Calcium-Chloride-Ice-Melt-Pellets-MELT20CPP/311687848

Is this just a cover on the back end of my SS Hayward pump? Can I just replace it? Or is this a motor replacement? It’s still operating fine (4 years old). Don’t want to wait until it fails, looks to me like some preventive maintenance is warranted.

I have a white fiberglass pool and have been successful in keeping it pretty much spotless. The only thing that ruins the looks is the two main drain covers. The holes or pores in the covers look black, from dirt I surmise, since the pool is algae free (no CCs, passes OCLT easily, clear water...

I’m confused regarding the FC generation displayed in the Poolmath ‘Effects of Adding’ feature. My Hayward system runs in 180 minute cycles. If I run for 1 hour at 30% output, the cell generates chlorine for the first 54 minutes of that 180 minute cycle and stops. PoolMath says that would...

I have been in contact with a rep from Jack’s Stain Treatments in connection with attempting to resolve an issue I’m having with my pool chemistry after using their products. In my conversation with the rep, he told me that the iron, or copper, in a pool could be coming from liquid chlorine and...

Anyone figured out a way to remove these spider gaskets? They sell replacements, you’d think there would be a way to remove the old one. I’m tired of spending $100+ to buy the entire handle assembly. This will be two, this last one lasted less than a year.

I’m trying to balance chems after a Jack’s stain treatment for iron scale (stain solutions #1&2). The program instructions say “This treatment can produce false free chlorine readings for 3-4 weeks. Use the total chlorine reading during this time.” Does that mean that I should regard my combined...

First, a little history. At the beginning of last season, in March, I performed a Jack’s stain removal treatment for iron scale. I tested using jack’s stain ID kit and that was the recommended treatment for the stains I was seeing. I think the iron likely originated from the original fill from a...

Here in SC I ‘close’ for about a four month off-season. Closing consists of a leaf net over a solar cover, SCG dialed to O%, pump/filter set to run four hours per day in the early morning, testing and maintaining all chems, and sanitizing with liquid chlorine. So far, for 2+ seasons, I have not...

Can someone provide a salt cell run time formula or is there a calculator that is current and functional? Link please?

My SCG has been humming along forever, holding FC around 10, certainly in the 9-11.5 range. I check it pretty much every day (way too much I know) and with the SCG producing 3.0 ppm/day, so lots of data points. See my logs. A few days ago I skipped a day and when I checked the morning after I...

So I’m always a bit confused about how, or if I even need to, correct CSI. FG. Today’s test results (logs are viewable): FC 10.0 CC 0.0 TA 60 CH 275 PH 7.4 CYA 80 Temp 89 Salt 3200 CSI -.62 Could bring CH up a little, or TA, but that doesn’t do much. Could raise PH a little but hate to mess with...

I have the Warrior SI robot with both the ‘screen’ and pleated filters. I run with both installed. I suspect that it could be possible that I may not be getting the pleated filter completely clean by just spraying it with the hose and that, if so, flow through it may be impeded. Does anyone have...

I’m wondering, once again, if there’s something I should be doing to raise my CSI. It’s at -.42 right now. On the one hand I’m understanding that it isn’t that important given the pool is FG but other info seems to indicate I need somewhere 0 to -.3 to protect the salt cell from scale or for...

Help me out please, where am I going wrong. I set up a hypothetical 20k gal pool in Poolmath and entered 6.0 for measured ph. Poolmath tells me I need 52 lbs of borax to reach a target of 7.6. If I simply look at the Effects of Adding 52 lbs of borax it tells me that ph will increase 4.6. It...

Am I the only one confused about the resulting tested levels following chem additions, relative to the predicted PoolMath results? The differences seem to me to be beyond any reasonable margin of error. I could not be sure in the past that the errors were not the result of my 'guestimate' of my...

Can anyone suggest a good water test kit for iron?

I turn our HP to 'standby' in the off season (there is no 'off' setting on the Hayward HP) and allow water to circulate through it when the pump runs (4 hours/day). There is a valve and the capability to bypass the HP. Is there some reason I should? Sorry if this has been asked before.

Just closed/covered the pool for the off season. I run the SWG to maintain chlorine. Water temp never got lower than 53F last year and I expect pretty much the same this year. Chem levels are all pretty much in the ideal range right now except CSI. Should I do anything to raise CSI or just let...

When our FG pool was installled four well points were installed to alleviate a ground water issue. They are piped to the equipment pad and so obviously I can’t see where the water level is. I’m considering installing a sump pit near the pool so I can monitor the ground water level. How near to...

Can anyone tell me how to adjust the Hayward HeatPro heat/cool HP temperature differential setting? It isn't addressed in the manual as far as I can tell.

I have been adding CYA using the sock method in the skimmer. I squeeze the sock (a skimmer sock) periodically and a cloud is released into the skimmer. Is this white cloud considered ‘dissolved’ CYA? It wouldn’t get hung up in my sand filter causing my CYA level to rise over the next 3 to 5 days...

I just ordered new CYA reagent and CYA standard from TFTkits and none of the containers show an expiration date. Why's that? I expected that they'd be dated. How would one know how old they are and when they expire?

I picked up one of those generic PVC fountains/sprayers to put in place of one of the three 1.5" returns. Not much spray height so I plugged one of the other two returns to get some more pressure to the fountain. With the next couple of FC tests noticed right away that FC level dropped much...

All you fellow Carolinians with SWCGs in the path of Isaias, make sure you have some chlorine on hand in case power is out for a day or 2 or 3. I happen to have 6 gallons left from a slam a few weeks ago otherwise I'd be scrambling to find some today.

I think I'm prety good at the CYA test. I have the the 50 CYA standard solution to calibrate my eye and I think I'm at least consistent with interpretation of the sight picture when looking for the dot. The issue I'm having is that the Pool Math app doesn't seem to be anywhere near accurate in...

We have no traditional pool stores in our area, believe it or not, where we can get water tested. I would like to test my pool and tap water for metals, particularly iron and copper. I see some DIY kits for sale, at Home Depot for instance, but have found no threads in this forum discussing...