please help i can not keep my chlorine levels up. i am being attacked by chlorine i used the pool caculator and this is what it said. is this okay. i have a 18000 gallon pool, de filter, plaster walls. thank for the help. i'm a mom in trouble, her kid cant swim in the pool and it is 95 here in tx !!!! im using super shock 73%. it seems like i am always having to shock it and algee still comes back in 3-4 days. i have not went to liquid chlorine yet but my plan is to get this right and switch.
muriatic acid 42OZ