Fresh2o
Aquarium Advice Addict
Thank you. Yes, they are from the 50's-60's. I got them from ebay. The five gallon leaked and I was so upset. There are three options that I found to fix them. The simplest was to fill them with hot water, and sometimes they reseal. I tried it and it worked!
The Metaframes are so retro. I had one (10g) growing up and lost track of it in my college years. I don't think silicon was used to seal them at the time; it was more like tar or putty. It had a slate bottom.