I'm new to painted turtles and I'd really like to get a couple. Despite all of the care sheets I read and all of the websites I look at I don't know how big a tank I'll need for two of them. I have a 75 gallon tank (48"L x 18"W x 20"H). Could someone please tell me what I could keep in here if its too small for two painted? Thanks for your time

Dan Ketterman