Hi,
We had a 22k ig vinyl pool put in last year. The pool dealer installed a Nature 2. I read in the tips section (#2) not to use the grocery store chemicals with this system. Are there specific chemicals that I should not use, or should I just remove the Nature 2 cartridge all together? I only have a test strip kit and it shows that my Cl & cya levels are very low. I was going to add bleach but dont want to screw it up.

Thanks

Kevin