Hello, I currently have a 30 U.S. Gal tank that we keep 3/4 the way full the other 1/4 is room for out Yellow Pond Turtle's Basking Rock. I REALLY want a RTS I had two as a kid and loved their color and temperament the only problem is that I'm unsure of a few things and was wondering if you lovely/helpful people could help me

. I am aware that people say turtles and fish usually don't mix but my turtle loves his other fishy tank mates, and he tends to leave them alone other than the occasional game of chase. The main concern I have is both with the tank size and the other fish I have. I have 3 Tiger barbs (Still babies) and 2 Red Eye Tetras (Also babies). I have plenty of hiding places and everyone gets along great. The water in the tank I want to say is approx 25-28 U.S. Gal not sure on the exact number. Would I be good to get my RTS or should I wait till a later date when I can afford a bigger tank?