Alternatives to Bleach during end of Conversion

[CarlD]

Carl,

One minor comment regarding a high TA. You are right that there is no reason to lower a high TA if the CH is reasonably low in a vinyl pool in terms of calcium carbonate saturation (i.e. the saturation index), but there might be a reason to lower it if the pool is experiencing a rising pH problem requiring frequent additions of acid. Lowering the TA will help in that case. This is especially true for pools with more aeration (fountains, waterfalls, spillovers or an SWG).

Richard

Absolutely, Richard.
You are correct in both points:

1) If pH is constantly rising, then lower T/A to the 80-90 range to see if that stops it.

2) If pH is NOT a problem, then vinyl pools can safely allow T/A up to 180ppm (200ppm is the actually theoretical limit, but 180 gives you a buffer zone).

[chem geek]

Carl,

Please see this thread/post for a geeky question regarding the above discussion.

Richard