I went to REC Warehouse today to get my new filter and some CYA. When I asked the salesperson to lead me to the CYA he wanted to know what type of CL I'm using because their tabs have stabilizer in them. When I told him bleach, he flipped out! He said that was in no way safe for us to swim in because of all the extra things in bleach that are not in CL. I told him I've done my research and he said I should be looking at both sides, not just the good. He pleaded with me to use anything but bleach. Now my husband is worried that we shouldn't be using it. Any words of wisdom to convince hubby that it is safe?