I introduced a single sevrum that is quite a bit larger than my five 7-8 in pbass. There is no aggression in the tank at all and everyone is being extra active. The new sevrum has been in 24 hrs now and my bass are acting strange. Its like they are showing off eating the bubbles and making large splashing noises at the top. Everyone is fed and my water is good with lots of airation. Are my bass just showing off?