dried cement like coraline removal hints

[mr_alberta]

There is a product called "EZ-Clean" made by Deltec that works really well. Its just a powdered from of an acid that you mix with water and its aquarium safe.

Originally Posted by lockrookie

any hints on removing dried coraline algea off glass other than vinager or razor blades this stuff is dried on hard like cement lol. i forsee lots of elbow grease in the future. as well i need some aquarium safe black sylicone where to find.