Marie, purplegirl, be sure to email or PM me if the calcium helps. [ poolforum AT gmail DOT com ] I'd like to know, and I'll be sure to pass it on to Richard (Chem Geek).

Of course, if it does work, it will probably keep him up at night, till he can think of a possible analytical explanation for 'why' and 'how'. Me, not quite so much, but I'd still like to know.

PoolDoc