Thanks! everyone! And to reply to Watermom. We have a sand filter, but I honestly don't know much else about the type I think it is a Hayward. For chlorine we have been using the 3 inch tablets (approx. 2 in the filter basket each week) and liquid chlorine when needed. I have one of the test kits that uses the drops, but the below results were from Leslie's pool store as I do like to get it checked by someone else occasionally to make sure we are on track.

Currently the water is clear and we haven't had any algae problems, but I just wanted to make sure about the calcium hardness, because that is something I was unfamiliar with.

Again Thanks!