thanks for the feedback SpotsMama!
I just have one tank, It used to be filled with gravel, but I read about a month ago on here, what you said about the gravel so I got rid of it all and set it up like it is now.
Its just the one tank, two pics of it

)
I will take out some of the stones as soon as I post this, but im saving for a bigger tank too. The big one does love to swim.
Yea shakes the sick one and hes got the swollen eyes, but I dont know what the condition is and thats why I havent seperated them yet, hes been kinda a bit ill since I got him in Nov, while the other has been healthy as a horse, and he hasnt been effected yet and they like eachothers company!
This shows how little my knowlegege is with turtles ... can I submirge the heater completly?? There is electrics on it? ... *thinks about the filer - theres electrics on that too duuh!* ... sorry im a REAL novice! So its ok just to sink that to the bottom then?