Horrible Hard Water Stains
I bought a 55 gallon tank off Cragslist and it has horrible hard water stains..they can not be removed with vinegar or vinegar with baking soda. I have also tried using a knife to scrap it away...nothing. They seem to be very old stains. I was wondering if it would even be worth it to get chemicals to clean the glass or if it is not worth it. Do you know of any chemicals that remove stains that are very old? Thanks
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Fish tanks required equation.. X+1, with X being the current amount of tanks.