I have just set up a new bigger tank for my mbuna and they all seem to be having a fat sulk, water seems ok, Ammonia, Nitrate, Nitrite are 0 the only diference is the Ph is a little higher than the last tank at about 8.8 or 9 from 8.4. All the fish seem to be very sulky, not getting crazy cichlid frenzy when I lift the lid to feed and just hiding out in the rocks. They has only been 2 days in their new home, is this normal? They are eating but the food has time to hit the bottom not like before.