Quick view SHOCKWAVE CAL HYPO SHOCK | 100# CAL-HYPO 68% | CALCIUM HYPOCHLORITE | 100 POUND | POOL SHOCK | 25239 | SHOCKWAVE MSRP: Was: Now: $278.81 CAL HYPO SHOCK | 100# CAL-HYPO 68% | CALCIUM HYPOCHLORITE | 100 POUND | POOL SHOCK | 25239 | SHOCKWAVE