DIY Aquarium Expansion Tower

Expand your aquarium tank with an observation tower! Measure your aquarium and cut a piece of wood to rest on the lip of the lid. Find a large glass jar or plastic bottle, trace the opening of the bottle and bottom of the bottle on the wood and cut a hole in the wood between the size of the two circles. Cover the wood with a waterproofing sealant or wrap the wood in a piece of plastic wrap and tape the plastic wrap in place. Set the jar or bottle in the wood platform and use a vacuum to suck the air out of the tower.