Getting ready, but out of curiousity, I want to know for both? This is for gettting ready though
A product called CLR works fantastic…rinse and rinse and rinse…I would even let it sit in clear water 24 hours and then rinse some more just to be sure. It is environmentally safe so it is not like other hard chemicals. It is the easiest way …JMO.
Lots of folks don’t want to use any chemical and in that case use vinegar, but it won’t clean as good, and you really have to scrub.
It looks like the Vinegar/Lime away worked ok, its still there (hard water stain(, just harder to see. Where I have my 40 gallon tank set, it will be hard to see the water stain when it has water inside it...hopefully :)
super fine steel wool is what we used to use in the detail shop on car windows. usually 00 and 000 worked and there will be no scratches to your glass, unless you apply un-needed pressure. You might mix that with vinegar too, double power, and it may act as a slight lubricant.