New chlorinator

Hi all, I just installed a Rainbow 320 inline chlorinator. I've not used chlorine tabs before and am not familiar with the brands. I'm guessing that like all products, there are good and bad. What brands are best? Which should I avoid?

Thanks

I can't recommend a brand but I use the 1" tabs in my Rainbow chlorinator . The 3" pucks didn't seem to dissolve very well. I use it as a backup to liquid bleach that I use to maintain the level.