Swim World hit hard is concentrated Calhypo shock treatment. One bag (1lb) treats 10,000.
If you need less than a case (24) of Hit Hard Shock, please order this item (SKU 1605). If you need 24 or more, case prices include a 15% discount. Cases can be ordered with this item: Hit Hard Case 24
Note: Chemicals are local pickup or Swim World local delivery only