- Nov 12, 2017
- 12,403
- Pool Size
- 12300
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Yah, I went to great lengths to avoid an exchange. I even connected my auto-filler to my water softener, which measures zero CH, and I still got a CH rise. It took four years, but it got up to 580. I figured some was getting past the softener, especially when the thing is regenerating. But I hadn't even considered it leeching out of the pebble. Maybe that was it? Oh well. The why doesn't really matter.I'm kicking myself for ever adding CH. Pool almost a year old now. I brought the CH up to the minimum recommended amount. Now it's up to 625 and still rising. I don't really get it. My fill water is only 125 and I have an autocover so I barely add water. Only thing I can figure is that it's coming from the pebble itself. I read as much as I could and nothing said be careful with the CH because the pebble will add it on it's own. Not sure if this is normal or not. I do struggle with PH. Every week it goes above 8 and once a week I add about a half gallon to gallon of acid to bring it back down, all other levels are always optimal. Having to think about exchanging water now really sucks. I'm hoping to do it with rain water.....if it ever actually rains here.
Just FYI, even with a fill source of CH 125, you'll still get rise. CH doesn't evaporate, so any amount that enters the pool, however little, stays in there and builds up. Only an exchange (or splash out, or cleaning to waste, etc) gets rid of it. I thought I was controlling my CH with rain water, at least at first, but if I was it wasn't enough. And now it never rains, so that's not going to work for me. I had to exchange about 3K to get from 590 down to 390, so, no, not rain. I'll be happy to get a few gallons of rain this year!! I'm going to do a write up about my exchange experience, because I took some extra steps. But one thing I learned is that my softener will put out at least 2500 gallons of zero-CH water before it needs to regenerate. So I was able to replace all the water I drained with zero-CH water. That really helped, because I would have had to exchange a whole lot more if I had refilled it with city water.
Moving forward I'm going to be more proactive about it. If it rises 50, I'm going to exchange. Not let it get up so high. That way the exchanges will be smaller, with less chance of anything affecting the plaster or the shell. And/or I'll just add it to my annual spring thing: clean filter, exchange for CH, top up CYA and salt. It is what it is.
As for pH, four year old pebble and my pool still gulps acid. Again, it is what it is. I solved that years ago with automated acid dispensing. Worth every penny, just like my SWG.
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