First of all I want to say I am a brand new owner of 2 RES, Houdini and Lucky. They are 2 - 3 inches long. and Secondly I would like to apologize for the length of this post. I just have so many questions. But those will get asked over time.
Today we went and got them a 20 gallon tank, thinking it would be big enough, which now we know it won't be, but it will have to do the time being. But it is a big improvement from the small tank that they were in. I personally couldn't stand seeing 30+ turtles in a small 2 gallon tank. If I could of, I probably would of got all of them. But that is neither here nor there.
We also purchased a underwater heater and a filter. But now I feel like there is too much water.
There is 6.5 inches of water and they can get on and off the basking area with no problems. But it seems like they have a hard time getting to the surface of the water. I just don't want them to die, especially if its something I could of prevented.
Thank you in advance for the tips and suggestions.

