Quote Originally Posted by herb396 View Post
Janet,
I mentioned the chlorinating using calcium hypochlorite granular chlorine because it was what Ben's initial directions gave me when giving he help develop a plan to address the stain.

But if the calcium is going to be an issue,,,then obviously I just want to do the right thing.
I would follow Ben's directions. In fact, in this newsletter he talks about shocking with cal hypo in the skimmer
http://www.poolforum.com/pf2/showthread.php?t=10246
and he gives much fuller directiosn here:
http://www.poolforum.com/pf2/showthread.php?t=10217
He suggests that by using cal hypo this way excess calcium precipitates out in the filter and acts as a 'filter aid'. Worth trying but do keep tabs on your
CH and if it climbs beyond reasonable levels switch back to bleach.