I recently bought one of these for a new 180 gallon tank. My LFS recommended I run it with a power filter, HOB. The canister is rated at 331 GPH for a 64-160 gallon tank. I know it is undersized, but when I installed it I was blown away by how weak the flow is from the spraybar. I recall I had a Fluval 406 on a 90 g tank and the flow was super. What am I missing here ? Would it get better flow without the spraybar ? At this point I am contemplating getting a 2260.