In my unprofessional-but-lurk-on-the-board-a-lot opionion, I'd say just add bleach to get the chlorine level up. What does your water look like? Is it clear or do you have algae? Sounds like they want you to buy some sort of metal-out or something. Your hardness doesn't look too high to me, but I'm not at home to be able to look at my cheat sheet. I know mine runs about 50 and I know I've got PLENTY of wiggle room.