Quote Originally Posted by Spensar View Post
What's the pitfalls of running the PH a bit high, around 7.8? That seems to be where my pool likes to sit.
That's about where my pool likes to settle if I don't mess with it, too. Ben always held that the chlorine is more effective at the lower pH levels. However, my daughter reports less eye irritation when I let it stay higher.

You can't let the pH get high if you have a high calcium level, or if you have metals in the water that you're trying to keep from staining the pool. High pH and/or high TA will tend to make calcium flakes precipitate out of water that is very high in calcium, causing a milky pool, and high pH will help the metals "fall out" of the water and begin to stain your pool. Otherwise, it doesn't hurt anything that I know of to let it stay at the higher end of the range.

Janet