here is the link to the Vermont method

http://www.rhtubs.com/dichlor_vermonter.htm

While dichlor will build up the CYA, it is not a problem for me because I change the water every couple of months anyway. The di chlor is easier to handle in small amounts and easier to maintain pH. Have never had any problem with the CC smell... I guess it is a matter of how well you shock.

I tried Cal hypo once, but it was not good. The calcium levels build up fast, and you end up with cloudy water and clogging your filter with calcium precipitate.

Of course the BBB method is basically the same thing, just substitute liquid bleach for the di chlor. You just have to remember to add a little bleach everyday, especially after you use the tub.

Hal