I dont have any pics I can get some if you'd like but its pretty easy. I have the Biocube so you'll have to adapt to the explanation.
The cube has 3 chambers, looking at it from the front of the tank the right side is the intake where water is drawn in. Then it spills into the middle chamber originally set up for wet dry filtration. After that it passes through the sponge to the third chamber where the return pump is.
What I did was turn my middle chamber into the fuge. I took out all the bioballs and replaced them with LR rubble, I then bought some chaeto and put it in on top of the LR. Out side the tank is black but its just paint so with a razor blade and some time I scraped off the paint exposing the middle chamber where you can see it now from the out side of the tank. I bought a small desk lamp from my local hardware store, and a 26watt daylight bulb from pet store. Its original design was to promote plant growth in terrariums for reptiles, its a flourscent type bulb and doesnt get hot. I placed outside the tank shining in through the paint has been removed, and it has already started growing coraline algea in my fuge so I know its working. Thats basically all, I turn the fuge light on when the DT lights are off.
