Hi, I just had my pool water tested at the local pool store. They said my pool hardness was low. 110 ppm. So they had me buy 10 lbs of calcium chloride to add to pool. I just read the container and it says that this is used to protect tile, grout and metals in pool. I have an above ground 16 x 30 vinyl pool. With a plastic hayward ec 40 DE filter and hayward pump. I think I got hosed by the pool place. I don't think I need to add 10 lbs of this stuff at 17 bucks a container.
So, should I add or shouldn't I ???
Also, if I get some heavy rain how do you drain the pool with my setup. The filter has a drain cap on the bottom side of unit but will that also drain my DE out?? I have no other drains to do this.
Thanks a lot.