Long story short: set up a tank, checked water. Went to pet store, they convinced us an aqueon evolve 2 (little self contained tank) would be better for the frogs. Came home with 2 frogs and aqueon tank, moved water over, put in frogs. In the morning both frogs are in filter chamber. One seems fine, the other moves but lies on it's back on the bottom of the tank.

More detail: when I checked water, there was no chlorine but it was still alkaline. At the pet store, I was told this was OK.

After we found the frogs in the filter chamber, we unplugged it, and I moved everything back to the larger tank I had initially setup. I couldn't get a net into the tiny filter area, so I poured them out into the tank. One stayed on his back in the chamber, and I had to gently coax him out by sliding him with a clean chopstick. Once in the tank, both swam around for a bit.

When I checked on them, the one who had been stuck was lying on his back on the bottom of the tank. I filled a clean jar with water from the tank, and went to fish him out. He moved, but didn't turn over. He's still in the jar, moving occasionally.

Is he hurt, sick, or fine? Should I keep him isolated, or move him back to the tank?

Thanks.