Hi there I have just set up a 1500L marine tank it has been running for about 2 weeks now. I have not had the lights on yet and the skimmer has not been on and I have been checking the nitrites 4/5 days ago it was bright red and now it is coming down so I am thinking of putting 2 clown fish in about 2 days time. So I was thinking about putting the lights on and turning the skimmer on is that okay. Peter