cichlid_tank619
Aquarium Advice Freak
Bought a tank from someone. It's a good soils tank, no cracks or leaks. The problem I have is it looks like there's a residue that looks like calcium or grime that dogs the glass. I tried vinegar and scrubbing it but it won't come off. I also tried to scrap it with a razor blade.
Is there anything out there that's safe to use to remove it?
Is there anything out there that's safe to use to remove it?