last night i moved my 4 small p's into my larger tank with two big ones. when i checked them this morning, three of the small ones were doing fine, swimming around and being active. the fourth is sitting down in the corner, not moving much at all and breating fairly rapidly. when something comes near and disturbs him, he responds and swims a bit, but he seems very disoriented and can't keep himself righted. there is no damage to him; he hasnt been bitten or anything. is it possible its just stress from the move?