I've had my tank for about 4 months now and near the early stages I accidentally caught a pebble of substrate in between the magnetic glass cleaner i use. It etched a pretty good scratch close to the top rim and i was curious if there is anything safe i could use to fill or hide the scratch? It is very close to the surface so during a typical water change the area is above the water level. Obviously any toxic substances are a no no.
Appreciate any advice!