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I picked up a used 55 gal. aquarium that had been used for salt water. It has very heavy deposits on the glass and vinegar and razor blades had no efffect. Any ideas? Thanks.
Rick
It's been mentioned before to try Bar Keepers Friend. Can find it in your local grocery store. Same aisle of detergents/cleaners. Cardboard can like comet.
I would do 10% bleach personally. Tank and filter running for 24 hours then drain and run two 4-8 hour cycles of clean tap water draining COMPLETELY each time.