I've had mine about the same time. I only have one live rock and 2 juvenile clownfish in there. Plus sand. My clownfish HATE the daylight lights! Hoping adding more rock will help.
My 32g biocube has only been set up for 10 days. Currently stock config, but have the following on order:
Tunze 9001 skimmer
InTank media basket
MightJet 538 Return pump
Tunze Turbelle 6015 power head
Current Occupants:
Ocellaris Clown
Mini brittle star (hitchhiker)
30 pounds live rock