Gumball Fish Tank DIY 1. Take all mechanics out of gumball machine 2. Remove glass that will be used for your bowl, take to local glass shop and have glass cut to match the bottom of what will be your bowl 3. Purchase Aquarium safe sealant from Lowes to adhere the new glass and the glass of the gumball machine together, I do mine in place and glued to the base as well at the same time. 4. Fill with decor and add a beta Hint** the fake gumballs are actually bouncy balls from the $1 store!!