Choices... you are a bit north in the US, so you can have cold nights. The system could work for you if you time it right, and choose carefully. You can put fish from the margins of the tropics outdoors - but not for long. Something from the Florida/Mexico band, extended around the planet, or from the equivalent band to the south, can do well from now (May) into September. Fish species that thrive at 15-16c are fine - true tropicals generally aren't.
You need to be able to catch them in the Fall, no easy feat if the container/pond isn't small. But a too small container will fluctuate in temperatures, so it's a trade off.
Livebearers? Platys and swords should be fine. Mollies that aren't too 'fancy', and aren't all black would be good. Short tail guppies would thrive. Fancier guppies are a good question - I haven't had any since the Beatles were a thing.
I have put hard to breed equatorial species outside for June, July and August, as the diet of mosquitoes and bugs does wonders for hard to breed fish. Beware of raccoons though. They are resourceful. Tiny fish aren't much of a meal, but they seem to enjoy the sport. You may also get dragon fly larvae, some species of which eat fry and very young fish.
I avoided fish soup by using very shaded areas, which also tended to be buggier. Heat's an issue, but falling temps more so. It's a very short term project in our climate - you set it up and it seems the next week you take it apart.
