As some of you all know I'm having a problem with my common pleco that is in a long 20g, well I was wondering since he can't seem to find a place to claim as his because the tetras run him off from any spot he choose's could I maybe add a big cave or driftwood so he can "hide" from the other fish and get some rest and claim it as his spot, will this work and calm him down until I can get him at least a 55g?