I added a Percula Clown to my new tank 5 days ago and it as stayed in the top left, back corner of the tank pretty much all the time. Every so often it attempts to swim at the front of the tank, but looks like it is struggling to swim against the current, then it just gives in and goes back to the corner. When I put food in it will only eat it when it goes into the top corner, it won't venture out to get it. The tank is a river reef 48 and I am using the stock 550 ltr pump pointed upwards at the surface, along with a vortech MP10 that is on a really low setting. I tried turning all the pumps off, and it did have a quick swims across the tank, but then just went straight back to the corner. I have had clowns in the past that have loved strong flow, so can't see why this would be a problem. Anyone got any thoughts and advice on this ?