Following. I ordered 15 lbs of Base rock since we only have about 18 lbs of Live rocks on our 29g with Ocellaries, Cardinal, Lawnmower blenny and few CUC. I am hoping to reduce the Nitrates for adding more Rocks. The readings are about 5-10ppm with every two weeks w/c, no skimmer and with HOB Aquaclear 70. Planning to add Corals soon- LPS and Softies.