Believe me, I know what you mean about the school week--next week is our last but I've spent all day today in assemblies at 2 different schools, and still have a banquet to attend tonight.

Regarding cal-hypo, based on 12K gallons, each 2.5 oz should raise your Cl by approximately 1 ppm. 12 oz should raise it by 5 ppm. Not sure how much stabilizer one trichlor tab adds, but I think there's a post somewhere around here about it--I'll see if I can locate it.

The fact that the backwash water looks nasty is a good thing--that stuff came out of your pool!! Keep up the good work, and just think how it feels when you can show off pretty pool pics to your local store!

Janet