PH Question

[cnk]

In previous years I have always had trouble with my PH rising. I would add muriatic acid & within a day or two it would rise back up. Is there anything that can prevent this? I have a 12,500 gallon fiberglass pool.

[aylad]

In previous years I have always had trouble with my PH rising. I would add muriatic acid & within a day or two it would rise back up. Is there anything that can prevent this? I have a 12,500 gallon fiberglass pool.

What is your Total Alk, and do you have a waterfall/fountain/anything else that aerates the pool water? Aeration of the pool water will make your pH rise, although at what rate really depends on your alk. Also, what form of chlorine are you using? Bleach has a higher pH, while trichlor/dichlor is lower. Depending on your CYA level, you could use trichlor to help chlorinate and keep the pH down, until yourCYA level rises to where you want it.

What is the pH of your fill water? Some pools have a pH at which they like to "stay"....if left alone, the pH in my pool will invariably go to 7.8 and then stay there....unless I'm using trichlor or acid. In that case, it's just easier to live with a slightly higher pH than it is to fight it.

Janet

[cnk]

I haven't uncovered & tested yet this year, but as soon as I do I will post my #'s. I never thought of testing my faucet water. I will do that. Also, I've always been confused on when to use Borax. I've never used it, could someone educate me on it. I just use liquid bleach & muriatic acid. I had the same problem when I used Baquacil.

[Watermom]

Borax is used when you need to raise your ph. Since your ph tends to run high, you don't need to use it.

[aquarium]

When you test your tapwater be sure to let it sit in an open container for 24 hours before trusting the test result. Some water treatments drive all the CO2 out of the water to make it less corrosive to the pipe system. After sitting out for 24 hours that water will take in CO2 from the atmosphere and reach a stabilized pH level.

[cnk]

Thanks Guys! We are on well water.