frasertheking;911289; said:it is just a giant version of a cup filled under water , flipped over then partly lifted out the water and the water stays in the glass
frasertheking;911297; said:just stick a one way valve on top and suck the air out and the water will fill the void . or just stick a pipe to the top and remove the air and water will fill its space
frasertheking;911332; said:i think a vacum pump would work for the bubbles but im just wondering if a powerhead would provid the same circulation if pointed up into the tall section ?
frasertheking;911335; said:not sure but i think they are only there for circulation