My pool has a CYA level of 120. I was using Dichlor and Trichlor for years but recently switched to bleach. Should I drain half of the pool and then refill it?
Also, the hardness of the pool is 310. Will I need to add calcium after I refill it? If so, should I just use calcium hypochlorite shock as my chlorine source until the hardness returns to normal?
Also, the hardness of the pool is 310. Will I need to add calcium after I refill it? If so, should I just use calcium hypochlorite shock as my chlorine source until the hardness returns to normal?