Dennerle Cleanator

Finally got rid of the limescale crust on my aquarium glass that I thought was permanent—the sponge scrubs it off with light pressure and doesn't scratch the silicone seams at all.

I've been battling stubborn green algae on my aquarium glass for weeks, and this sponge wiped it off without any scratching. Even the crusty limescale along the waterline came off easily.

Finally something that actually takes the hard green spot algae off the front glass without me scraping for twenty minutes. The sponge is firm enough to get limescale off near the waterline but it glides right over the silicone seams without nicking them.