I am pretty new too but, parameters should be the same no matter that size. Once cycled, they should be Am 0, Nitrite 9, Nitrate less than 10. Lots of other things to watch if you are doing a reef tank. Are you testing your water yourself? It not, I recommend it. I was told API had good kits and I bought the Saltwater Master and the Reef Master. Later, I found out they are not the most reliable. Ask around and see what everyone recommends then start running your own test. The directions tell you what the levels should be at.