After sucessfully installing my additional Eheim 2213 extrenal filter (alongside my Bioflow 3). I was wondering do the currecnts created by the output tubes/spray bar bother the fish, they seem to be trying to swim against the current and 'fly' back in the opposite direction. It doesn't seem to bother them, but can't work out whether they are enjoying it, or they just want to get to the other end.
Cheers
Cheers