My red devil has up until now gotten along pretty well with my belly crawler pike, but recently i notice him trying to get into the fake tree trunk i have for the belly crawler to hide in. at 9 inches long and over 4 inches top to bottom already (i have only had him a little over a year), there's no way he can get in there, but he sure is trying like hell. another thing i've noticed him doing a lot is sucking up gravel and spitting it into the openings in the trunk...talk about sinister! craziest fish i've ever had. anybody else had any experiences like this?