Seems like a no brainer that these would be available, but I can't find anywhere. Ate they even made ??? Basically looking for a tank for my novas that I can put any liquids in and not worry about compromising the integrity of the plastic . I need one that I can put any liquid in AND still see my fluid level. A glass tank , or metal tank with glass window seems the only solution as the STV nova tank still has a plastic window , right ??