Definations

[CarlD]

I have an inline chlorinator(?) thats still in the box. I was thinking of it installing this year for times when I wont be around for a few days. I got a Leslies catalog and they have chlorine tabs that say they wont effect PH much. I was going to try this and see how it goes.
Thanks
John

I guess it's true depending on how you define "much".

Tri-chlor tabs are extremely acid and push pH down. Di-Chlor tabs are much harder to find and while they are neutral, adding chlorine has an acid effect that pushes pH down.
Bleach is very basic, but the acid effect of the chlorine in the water negates it giving a virtually zero-change effect to pH.
Cal-Hypo tends to be very basic too, and seems to actually help pH rise. It also adds calcium and calcium hardness to your water.

This is why in general bleach or liquid chlorine (same thing in different concentrations) are the best chlorination over the long term.