hey people, never posted in the pleco section...just had a question and you guys have some AWESOME plecos BTW..i have a maybe 4 inch rhino hes great i think, as far as looks go...but my question is he usually is very healthy never no signs of bein sick.but recently i noticed him just kinda floatin on the bottom, not dead just kinda hovering.he props himself under things so he wont float away it seems...is this normal for plecos or is he sick?i never noticed him doin it before...thanks