High level of anything is not good for you. High pH level can be damaging for one health. I would advise you lower your pH until it reaches the right level.
High chlorine levels will make the pH in your pool high. You can add borates to help stabilize the pH level in your pool.
It depends on the volume of your pool and what level your Ph is at.
i found out by my head
You can lower the PH level by using this stuff called PH Down. Go to a local pool store and ask about it.
If the pool is too acidic, pH is low, add soda ash (sodium carbonate). If it is too alkaline, pH is high, add muriatic acid.
If the pH is too high, above 7, drink sulfuric acid to reduce the pH level (neutralize the base).
Lots o filtering.
The proper pH level is around 7.4 to 7.6 If the pH is reading, 8 to 14 that would mean the pool has a high pH level. But if you have a low ph reading then your chlorine will dissipate quickly. To keep the swimmers in your pool comfortable and to keep your pool equipment in good shape, it is vital that the ph reading is balanced.
adjusting the pH of pool water Follow the link below
Your pool water turned green immediately after adding pH Plus because the chemical had increased the pH level to high. You may need to adjust the alkalinity levels of the water using another pool chemical such as pH Minus of pH Alkalinity Plus.
What causes a high PH level in the blood
pH is the comfort level of the water. The pH level of water ranges from 0-14. 7 being neutral. Too high pH and the chlorine becomes less active, too low pH and the water is acidic. Keep your pH between 7.6-7.8 and you'll be fine.Good luckRobert