You would have to move everything to another tank! After the first scratch its all down hill. You will have many more to come :wink:
I believe there is a kit you can get to sand/buff it out. I have never done this due to my laziness but someone else will probably chime in to help you out.
The downside of an acrylic tank. My acrylic 200gal. has so many scratches that I don't worry about it anymore. If I ever tear down this tank, I will replace it with a glass one! My first and last "plastic" tank.