Calcium hardness causing problems?

[mas985]

Nicole,

Have you tested your fill water yet? In my area, I have pretty high CH in my fill water which makes my pool fairly high (~350 ppm). If your fill water has lower CH, you can partially drain the pool and refill to lower it. If your fill water has just as high CH, then about all you can do is work around it.

With the numbers where they are, your PH needs to be around 7.3 and no higher than 7.8 to prevent scaling. If you cannot lower your CH, I suggest lowering alkalinity down closer to 80. This will bring your balanced PH up to 7.4 but try to keep the PH below 7.8 and that should help a bit with your scaling. Also, SWGs tend to raise PH so when you lower the PH, try to get it down to 7.2 so you have some room for it to rise during the week. This will help keep your alkalinity from rising if it is too high in your fill water.

[CarlD]

Nicole:
Is your pool vinyl or concrete/plaster/tiled?
What is the volume of it?
Have you tried ascorbic acid to clean the walls? I gather it's pretty good on stuff like that.