How old is this tank? And what are your other parameters. If its a new tank, it might just be going through it's paces.might have to be patient, or get a clean up crew.
FS is
custom made sump 37.5x 15.75x5.75
swc skimmer,
Compat rollermnat with 6 unused rolls( about a 6 mo to years worth)
and a bashsea 4x18 media reactor
$300 for all OBO