Biocube minifuge questions

How do I remove the back chambers to create an open space for minifuge?

 

It's an 8g biocube, has anyone done this? If so how did you remove the back chambers?

 

You don't remove any of the walls back there. What people do is they put a skimmer in the first chamber, remove the bioballs and put lr rubble and some cheato in the second chamber, and leave the return pump in the third chamber. There are little lights you get for the second chamber. Most people attach them to the outside of the tank and scrape away some of the black paint to let the light in. I'm not sure if anyone has done this with the 8 gal size cube, that one is pretty small.

 

Thanks for the info