I was in a local pool store a couple of weeks ago and saw something on the shelf called Caltreat from United Chemical.
The claim was that it could reduce CH levels by about 200 ppm in a 14k pool. Apparently, it works as some type of sequestrant and the calcium gets trapped in the filter.
Since my CH is rising again (up to about 650), I was wondering if this was a good alternative to draining.
The cost was about $40 dollars for the bottle. That's slightly less than I spent on salt and CYA when I did a partial drain last year.
Anyone have any opinions on this?