Planted Tank Enthusiast
Join Date: Jun 2013
Location: Gloucester, Virginia
im not sure if this will be safe so i am going to look into it more.. but i was thinking of trying food grade machine oil,, which is just basically mineral oil. i use it all the time at work on the plastic/glass shelves and on the stainless steel. since i started doing it i havent seen any hard water stains at all.. it is perfectly safe for people(not necessarily for fish though) now just to find out how safe it would be for aquariums.
if anyone has tried this or looked into it please let me know