the only fish i have had sucess keeping with my sliders were pretty much all the african cichlids i had to move into the tank in an emergency, pleco's and jack dempsys. i had a 200gallon tank go down and had to move the fish into the turtles 150. they were all around 3 to 4 inches and the turtles about 6. the only fish i actually ended up losing to the turtles were my two oscars, and a tinfoil barb. the 9 assorted affricans and the plecos and jacks seemed to fast for the turtles, and even aggressive to them as they outgrew them. most of them lived in the tank with the turtles for almost 6 months till i was able to replace the large tank.( an extremely high expense i was not planning on) i ended up leaving the jacks and the plecos in the tank with the turtles. ill try to get a pic and upload it, but theve been in there with the turtles for a little over a year now