Pyrex Replacement tanks for your favorite tanks are a very cost-efficient way to repair a broken tube a or even just customize the look of your tank. Popular tanks such as the Kanger Protanks, Mini Protanks, Aerotank, Mini Aerotank, Nautilus and Mini Nautilus all have glass tubes that can be replaced if broken. Aftermarket clone replacemenet tanks are essentially identical to the facorty replacements and even makes it less expensive to repair your existing tank rather than replacing the entire device.