I have found that hard water stains are very tough to remove with any kind of cleaner. I decided to try the non-toxic vinegar soak without success. I just recently had to clean out an old 20g fish tank to make room for one of my P.l.l females. I picked up this hard water stain remover from Home Depot. It is in the cleanser aisle in a little yellow bottle. Not sure of the name right now. Basically, it is a mild abrasive that will not scratch the glass surface but will work on the mineral deposits with a little of the proverbial elbow grease. After that, I used a fresh razor blade to scrape all of the rest of the hard water stain from the tank walls. This worked wonders for the tank that had been sitting for over a year uncovered in my shed with that thick line of hard water mineral deposits. Most inportantly, I have learned prevention of this as opposed to treatment. I now solely use distilled water that I pick up at my local OSH for around $.79 per gallon jug. I end up using 2 to maybe 3 in a month. Zero hard water stains going forward. Hope this helps.

-Adrian

Phelsuma laticauda laticauda
1.2

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