My new pool has been service for about 3 months and has always had a fairly substantial leak at the bottom of the skimmers inn the overflow basin ... I was never able to find the exact location of the leak ... the leak has now suddenly disappeared ... the only thing different that I can think of is that my CH started at 0 and I have now brought it up to 250 ... is it possible that the calcium addition somehow stopped the leak or is that merely coincidence ???