Hey, all you chemistry gurus out there! I have a large bucket with maybe 30 lbs of calcium hypochlorite shock in it. It was from my old, non-SWG pool, is now several years old, and I suspect has lost a lot of its chlorine strength. I need to add about 30 lbs of calcium to my SWG pool now to increase hardness to desired level. What I'm wondering is if I add this calcium shock, will I get a similar calcium hardness boost, like when I add calcium chloride? It would be a good use for this old stuff, if I can. Would save me from buying more calcium. Any undesirable effects you can think of for my saltwater pool? Of course, I wouldn't add it all at once, 'cause the chlorine would go off the charts and bleach out my liner! Would appreciate hearing from someone "in the know" on this.