Hi Reesie - I just saw your post to my thread and I find it so interesting that we both used the CDX system ( as well as those oxidizer tablets) these last few years - even more evidence that the CDX is playing a role in why our conversions are not going as planned.

Every time I think I am gaining on my pool, it backfires. For example, I had a day when my FC was 5 and CC was 0.5 - and then the next morning it was 4 and 1. When I then added bleach ( to keep my FC high like is recommended) my FC only raised to 5 but my CC went to 6! It has happened again today. Very discouraging.

I read on another forum one person who said it took 2 months to convert. And I would rather not wait that long.

I have ordered the sodium percarbonate and will try it in a 2 gallon or so bucket at the recommendation of chem geek before I put it in the pool. At the same time, I am making preparations to do a drain and refill. This is a really busy week for me with work so nothing will happen quickly, but feel free to follow along on my posts - I will certainly let you know if I have any significant luck with the percarbonate! Hopefully your conversion continues to move in the right direction. aciam