Another model In The Swim Chlorine Pool Shock. But if you have more than a spot, itd be best to triple the dose. Shock dosages are usually 1 bag per 10,000 gallons of pool water. Works Without Batteries. Algae feeds off high pH levels and chlorine isn't as effective when your pH is high. Add Pool Shock per label instructions. If you havent used chlorine shock before, its best if you consider using calcium hypochlorite shock. NationTV bags Mani Mekhala awards for best news channel, best news show. So, for 25,000 gallons of water, use 5 lb. How Dead Algae Gets Into Your Pool. Green water is caused by algae, which is prevented with chlorine shock and tablets. With a chlorine content of 80 g/l, use 10 liters of liquid chlorine per 25 m of water. 3. hth Pool Algaecide Super Algae Guard 60. The calcium hypochlorite is the perfect type of chlorine to shock the pool. For best results, vacuum the pool before shocking, and brush the entire pool before and after shocking. The most expensive pool shock does not always indicate the best decision for you and your money. Heres how much shock to use to remove pool algae: CONSTRUCTION. So lets say youre