Crystal clear water but all figures a bit off.

[CarlD]

Ok I admit that was a stupid idea.

I brought my PH down to arround 7 the lowest I can see on my test kit. And I started aerating with a nozzle. I also used the power washer when I cleaned my deck. That works very good. I got my TA down to around 120 on Saturday and it went back up to 130 Sunday. My PH went back up to 7.6 so I added last night more acid and will aerate today more.

Guido

That's the way to do it. You rachet the T/A down, pH rises from aeration, then you rachet pH and T/A down again. You are on the right track. However, I would not be so drastic in aeration. Leaving your pool uncovered helps. Tossing in a half-dozen 10 year old boys will aerate very nicely. When I have to do it, I have a little sprayer that screws into my return, replacing the eyeball jet. It's about $20 and does the job beautifully.

I believe that you will need to add a lot of acid to your pool generally this year as the concrete/plaster cures. I don't know alot about SWGs--just some super-basic stuff. Normally, Tri-Chlor pucks are great for new concrete because they are acid, provided constant chlorine, and add needed CYA. But your CYA is almost too high.

I THINK you can use the SWG, and compensate with Muriatic Acid, but the pool guys will know better. With your PERFECT calcium levels, I'd avoid cal-hypo too. I suspect when T/A is below 125 and pH is around 7.5, your scaling will stop. But I'm speculating.

[Guido]

I will try to get TC at the level the best guess chart suggests at around 6 or 7 so I will be OK with my CYA and will see how the CYA will drop over the summer with backfilling and so on.
You mention a sprayer for the returns. Were can I get this type of things? I would like to have something similar as the 10 kinds from the street we live in, think the water is still to cold to swim.

[LostboyinVA]

Guido, Carl mentioned that your CYA level is high, but it is the level recommented for most SWG manufacurers. They also recommend being able to run a 2-4ppm CL level with that high of a CYA. I run my CYA lower then recommended, but have no issues with only a 2-3ppm CL level. The theory for this discrepency for the difference from Ben's best guess chart is the superchlorinating effects of the SWG cell. Also I'm going on the tail end of my first year with a SWG. Just keep adding acid as needed. I have to added about 1/2 a gallon twice a week to keep my PH level down in my 30000 gallon pool. Finally don't worry about the high CL level and the SWG. It will still eventually come down to the maintenance level set via the SWG. I would recommend not turning the SWG on and off, just find the correct level and leave it on.