With the industrial strength lime deposits on those tanks, I would head
directly over to the pool supply store(or Home Depot) for some
Muriatic Acid. No elbow grease needed, just wipe on...wipe off.
It will work so easily that you'll be back on this thread
thanking me profusely.
Good luck and post some pictures of clean glass boxes!!
It actually looks alot worse in the photo than it really is, but I'll keep muriatic acid in mind. I'll go at it with vinegar, Isopropyl alchohal, and bleach tomorrow. If that doesn't work, well, I needed some fresh razorblades to take the rims off the 10 gallons anyway.