I don't have any experience personally with pool heat pumps, so I can't really comment.
I did add your approximate location (from your IP address, and phone) to your visible profile, since that's critical info with respect to your question -- pool heat pumps CAN work in S. Florida, but they don't work so well in Michigan!
I should add -- if your heat pump is "rusting into your pool", you need to find out why, and fix THAT problem, BEFORE you get a new heat pump. You probably should report how you've been treating the pool, chemically, and how you are testing.
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