OK I have a 30 gallon aquarium that has been running for three months. I put an inch and a half of live sand in it. It has only one starfish and a handfull of olive snails. However even with three times the required filtration wet/dry, biological etc it has a Nitrite issue. Two weeks ago I did a 25% partial and the problem is still there. Nitrite is registering about 1.0. The Amonia is .6 I had really hoped it would be all clear and ready to roll by now. I am not using a protien skimmer and plan to add one because it is the only thing I can think to do. The thing is I have run the very same system many times and set it up for others without this problem and without the skimmer. I like to keep things as simple as possible because it leaves less room for something to breakdown and cause trouble. I welcome your input, please help me brainstorm this one.