Trainers are always "floaty", that's kind-of what makes them trainers. No plane will stay up below it's stall speed though (which is kinda what makes them planes) so the trick is to use a prop within the engine's recommended sizes (so as to not over-rev or over-load the engine), make sure it's idle is set as low as possible while still being reliable, and use long slow approaches to bleed off speed. If the plane will fly level or even climb at idle, your idle's too high (or the engine's too big for the plane).