M Mere Air New Member Joined May 29, 2004 Messages 7 Reaction score 0 May 30, 2004 #16 I use an expired credit card to scrape hard water marks from inside an occupied glass tank. Outside the tank, I use a white vinegar/hot water solution.
I use an expired credit card to scrape hard water marks from inside an occupied glass tank. Outside the tank, I use a white vinegar/hot water solution.
