Most of the users here are pool owners, not pool builders.

I made the decision many years ago to not tolerate standard pool industry chemical advice, and that I would not soft pedal or muffle my rejection of that approach. As a result this forum has never been a comfortable place for 95% of the folk who are in the trade.

It's possible for pool owners to learn enough pool chemistry to become expert in helping others, and this forum has depended on many of those folks over the years.

The same is not true of pool construction. Pool owners DO work with pool chemistry, but 99% of them are never involved in pool construction. That has been fine with me -- I have always considered the focus of the PoolForum to be pool chemistry and operations, NOT pool construction and repair.

However, it remains the case, that the sort of question you asked can only be answered well by someone with heavy pool construction experience.

Your best bet may be to post your question on poolspaforum.com, which DOES have a heavy pool industry user base. But while some there do accept the BBB method -- Waterbear is active there -- in general I would not recommend trusting them for advice on pool chemistry.