just the back filter components of the biocube, i am pretty sure they are made of the regular hard plastic, i am trying to bond it with a piece of transparent plastic cd case cover. Basically those dorks at oceanic decided to put a giant HOLE in the wall separating the 2 compartments. It's fine for their wet/dry, since water never reaches that high, but for co2 planted, i need to fill it up with water, and now the water goes through that hole instead of forced down the water column, essential by passing all filter media. picture of wet/dry below, the hole is in the wall on the left side.
anyway probably more info then you ever wanted to know
