When to add Metal Free in a brand new pool?

[bethanyboyd93306]

I thought I read to add something to prevent staining and deal with metal first thing. I cant seem to find it now. My question is, what is "first thing"?
My pool is 18500 gallons including the attached spa, and gunnnite with white plaster. They finished plastering about 2 hours ago (1030 am pacific) and I've got two water hoses chugging away to fill it. Do I add the sequestering agent as soon as the pool is half filled or filled or after I balance everything else? I know for a fact that metal is a problem in our city water but I dont have a test for it. Definitely don't want to risk staining.

 

[Texas Splash]

My question is, what is "first thing"

Basically once the pool is full and you start circulating water. The link for that is below. Welcome!

Start-up New Plaster

The first few months are the most criticle for a newly plastered pool. We're here to share best practices to ensure the plaster will last for many years.

www.troublefreepool.com

 

[bethanyboyd93306]

Thank you!! I KNEW I saw it somewhere. Thought I was going nuts not being able to find it again.