Thanks for the reply PoolDoc. I will try and give a little more detail.

What I have is this pool.

It came with this filter/pump. My desire was to upgrade to a salt water chlorination system, so I purchased this swcg. Running the system I got nothing but low flow alerts, so fine I will upgrade my pump. I read up a bit, and got this pump (minus the chlorinator).

Although both have adapters for the original 1.5" hoses, and the system is working fine, I am wondering if it would work finer if I upgraded the pool ports to 2".

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I might have the hose sizes wrong.