Skimmer Nog color!

[jorjef]

40 gallon tank 60 or so pounds of live rock, live sand lots of corals next to no algae, hi Nitrates, tank running about a year..Bio load was five clowns none bigger than 1.5" couple brittle stars, couple cleaner shrimp and feed corals mysis 2 maybe three times a week....So now I put a Tunze 9002 skimmer in the tank I know under sized but I don't want SPS quality water with the corals I have. Skimmer running about 2 weeks and the waste it produces has a light green tinge rather brown...Never had a skimmer before and never read much about green skimate Does this mean anything? do I need to adjust something..? lol not much to adjust really..Just wondering why it is green..