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If your not living on the edge....Then your taking up to much space.

This is what I was planning to do. Use two tupperware containers and seal the tops of their lids together with some silicon gel or other sealant then cut out the middle leaving about a 1 inch boarder around the edge. Then take a peice of screen and seal it along the 1 inch boarder. Then put your wet perlite on top of the screen, the key is to having all of the screen covered with perlite so the air is forced to go through it. Now put you lids on run your air pump hose below and the hose to your grow chamber form the top. The perlite will probiblely dry out pretty fast, but it would not be hard to remove the lid and remoisten the perlite. I think this would work however I have not tried it myself.