How do you take off aglea from aquarium rock?

To remove algae from aquarium rocks, start by gently scrubbing the affected areas with a soft-bristle brush or a toothbrush. You can also use an aquarium-safe scraper for tougher algae. If necessary, consider soaking the rocks in a vinegar solution for a few hours to help dissolve stubborn algae, then rinse thoroughly with water before returning them to the tank. Always ensure that any cleaning method used is safe for your aquarium's ecosystem.