i recently purchased a 125 gallon oceanic reef tank, close to 20 yrs old. I have the rocks in containers with powerheads to keep them alive, but the tank after cleaning has scratches from the rocks I assume and would like to fix them before starting the setup for my new tank. Does anyone know any tricks or have any tips for removing these? The scratches are not deep just surface scratches I cant even feel them with my fingernail, but I can see them while cleaning the tank out from months of neglect.