Tropical Fish Keeping banner
calcium deposits
1-1 of 1 Results
  1. Beginner Freshwater Aquarium
    I recently purchased a used 20g tank. The owner previously had a turtle in the tank, so it was filled halfway with water. Everything above that halfway water line has hard calcium deposits. So far I've tried using vinegar (5% acidity) and a razor blade but haven't made much progress. What...
1-1 of 1 Results