New to group

Hey Sean and Welcome !!!

We use PoolMath. I prefer the app but some prefer the old web based calculator linked at the bottom of the page. The app works fine with the free version but the $7 (yearly) subscription saves your data logs and is worth every penny. And it's barely any pennies. :ROFLMAO:

Here is the rundown on CSI and LSI. (We use CSI here)

 
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Welcome to TFP!! :shark:

You will find the recommendations here, potentially, quite different than the requirements to you have, to maintain commercial pools in Colorado. Just note that. Our focus is residential pools.