Hello all!! I'm a few weeks into cycling my tank and my nitrates are are at 20 <ACRONYM title="Parts per Million">ppm</ACRONYM>. I'm not sure what I should do. Here's my set up: 29 <ACRONYM title=Gallon>gal</ACRONYM> oceanic, Penguin Bio-wheel 200 filter, Prizm ps, 1 powerhead, 30 lbs <ACRONYM title="Live sand">ls</ACRONYM>, 35-40 lbs of <ACRONYM title="Live rock">lr</ACRONYM>. I let the tank sit with live rock and sand for a week then added a few inverts, a few scarlet reef hermits and astria and nassarius snails. There was a minimal ammonia and nitrite spike after the first couple of days, but since then my ammonia and nitrite have been 0 <ACRONYM title="Parts per Million">ppm</ACRONYM>. about a week after adding inverts with no changes. I added a couple of damsels a week later. That was a few days ago. Now my nitrates are at 20 <ACRONYM title="Parts per Million">ppm</ACRONYM>. I realized that i was feeding too much (twice a day). I cut back to once a day, with no change in nitrates. I also noticed that I had adjusted my skimmer too low, so I turned it back up. Should I wait and see if the skimmer adjustment helps? I'm hesitant to do a water change since what I've read says that I shouldn't change it while cycling. What do I do??? Sorry for the long post.