Oh, & while I'm at it, here's a related story:

My brother was keeping a Malawi tank many years ago & he & his wife decided to move to a new house, partially because of the horrible roach problem they couldn't get rid of. They had nuked the house several times, covering the fish tank with a sheet to keep them "safe", but the roaches wouldn't go away.

Turns out that when they took off the canopy while they were moving, a HUGE nest/roach colony was living inside. eeeek. My brother still thinks his now ex-wife created the roach problem to get a new house h34r

Mark