I have my 55g FW
cycling right now with my fluval 405. There is a sort of scum build up at the surface, I moved the outlet of the filter up a couple inches but it still doesn't seem to be churning enough.
Would you suggest using a powerhead without installing the UG filter? If so, do I need to put an intake tube on the PH?
I have two of these PH's, but they seem to be older models and no instructions.
As always, your input is very appreciated.