My tank (105 gallon) is 10 weeks "old". Parameters - Salinity 1.023, Nitrates 0, Nitrates 5, ALK 7.8, Calcium 430, Magnesium 1140. I have had large GSP and 2 Clownfish for 5 weeks and are all doing great. I would like to introduce some Zoas and maybe 1 more fish (Lawnmower Blenny or Yellow Tang?). Am I rushing things? Should I wait a bit more?