M. Osborne writes:

I am putting in a pool, and the Pool supplier provided a 250,000 BTU
Pentair MiniMax NT unit. I mentioned beforehad I had heard that many
units cost $5-30/day to run, and I wanted the most efficient unit
possible (in reason, cost/efficiency).

Let's put it this way. What are you willing to spend on power to heat your
pool? $50/month, $100/month, $500/month, $1000/month?

I expect you have no realistic idea how ridiculously expensive pool heating
is, no matter what the efficiency.