New Guy here. Trying to manage water chemistry. Help!

[BeejReef]

How confident are you in your calcium testing? It's an easy one to overcook and doesn't make a lot of sense why it would be increasing with the same water source. Try testing the LFS water for calcium and alkalinity before adding to your tank. Better yet, take your kits with you for your next water pickup and get the LFS peep to watch you test their water.

It's a real minor issue, but best to get to the bottom of it now. You'll want to be able to really trust your testing and water source down the line.

 

[The Aquatic Arsenal]

I would suggest cutting back your water changes. For example, IO runs high on just about anything.