So i get home from work tonight and i find my rubberlip pleco on ground upside down and black belly and black nose. Idk he waa fine this morning.. Hes in a 20 gallon tank and yes has drift wood in the tank he rarely was on it though. Moatly on filter intake wall thingy... Still have brislte nose which hes even smaller than the rubber lip like 2 inches maybe.. Sorry cant show pic hes already down toilet.. But veey sad and i dont know what caused the black body ?