We are going to be out of town for 6 days, and I have no one to add Chlorine while we are gone, so I am going to have to use the dreaded pucks. I am not to concerned since the CYA level is at 40 and 5 or 6 days of pucks shouldnt throw it to out of whack I dont think. My question is since I havent used chlorine pucks in so long what are the best types of pucks to use, already knowing no pucks is best? Thanks in advance