Great start and welcome to the board. One suggestion that I might make is to add a pvc elbow to your overflow, or if your adventurous build a small overflow box. This way you can raise the water level of your tank so that you don't see a waterline. I think that it is most people's preference not to see a water line in the tank. This way you also get a little bit more water volume in the tank.
Keep asking questions, this hobby is always a learning experience.
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