I have the aquaclear 4000. It killed a juvie false perc before. Then, I came home one afternoon finding my longhorn cowfish stuck face first in the PH
. The fish is back to normal now.
But I had to buy the long cylindrical thing for it. You just have to buy that because it can actually help in the filtration too. Plus, point the flow director diagonally towards the surface, it is a great tool for wave making. Also, it will take time before the intake is jammed with residue (food, poop, algae, etc).
brenden, you'll be surprised how strong the suction is on a 360GPH PH
. Sometimes it could be as stupid as a fish following an algae floating around or something (or any object) and ending up being sucked into the powerhead. It's that strong.