Open Bottom Aquarium

[burge1234]

I dont displace the tank that way though obviously. Be a lot of weight. Ive seen people use an air hose and suck the air out while water in the lower tank replaces the air. I have a special pump to do it though. Ive had a quick set up going for a month now. I just wanted to try this idea out before I ordered the glass for the upper tank. The lower tank and cabinet have been built already