TY, are you sure about using silicone on acrylic ? I didn't think it would hold . I 've tried using silicone on acrylic before and it failed . Now silicone on glass is a whole different thing .
oh, the tank is acrylic?! :duh:
well, then it's waaaaay easier. just use acrylic glue. not removable, but eh, gets the job done.