To save on cell life of my SWG, I plan to used bleach to get up to shock levels while opening, then turn on the SWG.

I was in Walmart (Canada) today and found small .454 kg (1lb) bags of "HTH Sock It" for $4. I believe it stated Calcium Hypochlorite, 60% available chlorine.

Is there any problem using this product instead of bleach.
The cost factor isn't an issue because its a one shot deal, but the convience factor is very attractive.