Quote Originally Posted by court475 View Post
I've always had alk/Ph issues. I got the alk down a bunch earlier this summer by using acid and aerating, and it crept right back up pretty quickly.
Since your CYA is pretty low, and your pH trends high, you are an ideal candidate for...dare I say it?...Tri-chlor tabs! They are extremely acid, which you need, and your CYA can easily tolerate going to 50 or even 70ppm. aylad, one of our mods, lives in Louisiana and she keeps her CYA around 70ppm to be able to have a consistent FC level--she just keeps it in the 5-10ppm range all the time.

We usually advise AGAINST Tri-chlor tabs because you can easily run your CYA up to 100 or more, and your pH down below 6.8--but you have need of the acidity and room for the CYA. Just be sure NOT to get the "double-acting" kind--they have copper in them and you don't want that.

Curiously, this season I have used tabs far more than before--the constant rain all summer keeps washing out the CYA and I just have to watch pH and add Borax from time to time.

IF YOU USE TABS YOU MUST TEST YOUR pH AND CYA LEVELS RELIGIOUSLY AND ABANDON TABS IF pH GETS TOO LOW OR CYA TOO HIGH.

When aylad looks at this thread she can better evaluate it as she lives in a similar environment to you.