I don't typically test my calcium hardness as we have a vinyl pool. I recently tested it and it came out at 25 (1 drop). I was looking for some confirmation of my testing (for CYA more than anything else), so I went to my local pool store to get a "free" professional water test. They tested and their calcium hardness came in at 14. They were freaking out because my calcium was so low. They said it was going to ruin my heater. We have a titanium heater and my husband says we should not be concerned.
So, I am concerned only for this reason. Everything I read on the website says that calcium hardness should be between 0-350 (vinyl) and no need to adjust. I am good with this, but with the store freaking out and wanting me to put 48 pounds of something in; I thought I would at least see what you guys had to say.
I would hate to hear that I should have made sure my calcium was at least 50 or something minor, so that we don't ruin the heater or anything else.
Let me know your thoughts.