David D Posted July 27, 2022 Share Posted July 27, 2022 Anyone have any success cleaning up hard water buildup in an old aquarium, bought an older tank with alot of build up, I tried laying the tank on its side and soaking with vinegar, and scraping with a razor scraper, it removed some, but the tank still shows cloudy stains on the glass from the buildup with water in it, most is around the top waterline area, any suggestions would be appreciated. I'm thinking of using CLR next but the chemicals may be harder to remove from the tank than the buildup. Is it possible i'm just too impatient and need to work the vinager soak longer and multiple times? Link to comment Share on other sites More sharing options...
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