I looked at the pics on your site, and what you have there is perfect! You may even be able to put a bit more water in, but make sure it's still low enough that they can't climb out. If you do add more water, check the basking temp because it'll push the basking dock closer to the light.
The only worry with hatchlings is to make sure they don't have to swim from the very bottom to the top to get air. I see you have little resting spots under water for them and that will help with that problem! They really are great swimmers. I kept my water level a little low for a couple of weeks and raised it slowly to make sure they were good swimmers but I don't really think it was necessary. I'm just a worrier
I also have a friend that thinks she knows it all. I think everybody has one of those
Just do what you already KNOW is right and let her say what she wants. Just smile and nod.
The things that come to those who wait may be the things that were left by those who got there first - Steven Tyler