Blue Horizons Granular Shock Chlorine 5 kg - Calcium Hypochlorite, 65% Available Chlorine, Algae Removal & Skimmer Addable Pool Sanitiser

Granular Shock - A traditional shock treatment product, these calcium hypochlorite granules have an available chlorine level of on average 70% making them a good chlorine donor for pool water problem solving.Granular Shock Chlorine is very effective at restoring sparkling water from algae infestation.Granular Shock Chlorine can be added through the skimmer.Top Tip:As soon as possible after a thunderstorm shock dose your pool with a 5mg/l dose of Granular Shock Granules or Shock ‘n’ Floc Granules.The reason for this is that lightening creates nitrogen in the atmosphere and the rain washes this nitrogen into your pool. Nitrogen is plant food and algae thrive on it, so pool water can quickly turn green after a thunderstorm, a shock dose of chlorine can help prevent this.Application Instructions:1. Maintain pH levels within the ideal range of 7.2 - 7.6. If the level is not in this range, adjust accordingly.2. Maintain free chlorine residuals routinely in the 1 - 3 mg/l (ppm) range. Shock o