My birthday rolled around and allowed me to buy and Aquaclear 70 so I could mod it in to a refugium. A bag of black sand went on clearance at work the week before, which I saw as a sign from the heavens that this tank was ment to be a 10 gallon. The other issue was one of light, I needed to raise the tank so it would be closer to the light, so since I needed to empty it anyway, might as well up the size.
The Aqua Clear 70:

El Fab's Simple Guide to Pico Tanks
The link is halfway through the article at the AquaClear mod instructions. The gist of it is: Shorten the intake tube, reduce the flow by removing the tab, dissect the media basket and use the parts to make chambers and add a light for cheato.






