Would it be possible to use the biorb as a fuge? I have an old 30 litre in a box in the garage. Just wondered, with a few mods would it sustain a big clump of macro and a DSB. I reckon if I drilled a couple of holes in the acrylic near the top, fitted a return pump it could be done, not sure about how to sort an over flow into the biorb mind, just an idea, prob a poop one tho