i have an oscar and a black tipped columbian shark(im sure most of u no) i just put them in a bigger tank and both pf them are just lying on the floor is this natural?
Did you tranfer the filter from the old to the new tank? How long ago and how did you make the switch? It's normal for fish to act a little stunned for a few minutes upon introduction.
Kudos on actually doing what every oscar owner I've ever talked to always says they will do. (Getting a bigger tank)