Hi neighbor! Welcome to TFP!!
I poured in the one jug of sequestrant left to me by the plaster company. Since then, I've put chlorine, muriatic acid, cyanuric acid and salt in my pool. (Oh, and some pesky humans.) And absolutely nothing else. One year old and I can't find a spec of calcium anywhere. My pool was covered in it before the remodel, so I know I have "problem water" from the street. I am fanatical about keeping my CSI between -0.3 and 0.0, but that's it. Follow TFPC and you'll be good to go.
If your town is like mine and you have high CH fill water, you might consider topping off the pool with soft water. That's key for me in keeping my CH level from rising.
Please have a look at this and fill in your signature, so we all know what kind of pool we're answering questions about.
https://www.troublefreepool.com/content/115-read-before-you-post