Hi, I currently have a 15 gallon column saltwater aquarium. I have had the tank up for almost 3 months. I have a power head, lights, Bio wheel filter, heater, and 15 pounds of rock. When added it was dry rock. There are no fish or anything in it, just rock, water, and sand. I'm waiting for everything to get leveled out. The problem is the nitrite and nitrate levels. I just tested it and the nitrite is .25 and the nitrate was 160. Last week the nitrite was 5 and nitrate was 10ppm.
When looking at normal causes online everything is saying it is caused by too much food, over crowding, and or bad water from tap. I have a RO
system that was used to add the water.
I am wanting to know what I can do to fix it since it seams like all the normal causes do not apply to my tank yet.