Calcium Hypochlorite doesn't fully dissolve

[dgcpe]

Thanks Ted. I figured that would be the answer (have heard it before). My pool is a 33' round, Pool Frog mineral/chlorine feeder, Pentair Clean & Clear 175 filter, 1 1/2 HP 2 speed pump, Raypak A406 gas heater, wife, 4 kids, dog...oh, sorry.

Anyway, this is season #7 for the pool and this issue has been prevalent since last year. I typically broadcast the shock over the pool. I opened Sunday and the cal hypo i used settled to the bottom. Shouldn't that filter out eventually?

I shocked yesterday using the method you described (mostly - I added 2lb to the 5 gallon bucket) but have not had an opportunity to see if it settled as the kids hit the pool right after school and its all stirred up. It is pretty cloudy though.

Other info from tonights testing, Chlorine about 0.5 with Frog set at 3 (i usually run 2.5), pH 7.6, Alkalinity 140.

Thanks again, any other thoughts would be appreciated (alternative shock chemical perhaps?)

Doug...

[JimK]

I noticed the same thing when I shocked with cal hypo. Since I wanted to stop adding calcium to my vinyl pool, this year I just end used plain bleach. No predissolving necessary and problem solved.