The Arlington Pool is nice. The locker room facility is dated. County owned.
My recommendation would also be the
Sarasota Sharks which is the outdoor pool at the South YMCA
8501 Potter Park Dr, Sarasota, FL 34238. When you pull in to the main drive the outdoor pool will be on the right(it has a large slide for the summer camps). It was recently taken over by the Sharks so is no longer associated with the YMCA. Great people and a variety of swim levels. I would typically swim at the 5:30 practice. This is when most of the fish swim. The 7:00 is mixed. Saying that I have not been down there in over a year because I'm lazy so it may have changed but I doubt it.
Edit because the table I inserted of practice times did not show well. You can find it at the link provided earlier.
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Yes