Sounds like I'm going to need more test kits than I thought.
As far as the nitrates, it's actually at zero. It's been that way since I installed my refugium two months ago. The reason I said it's less than 5ppm is because one of my LFS told me that's impossible. I even brought in a sample of water. He tested it and said my cycle is not competed cause I don't have any nitrates. I asked him to explain why tank is not cycled if my ammonia and nitrites were also zero. He said my cycling has not started yet. At that point, I thought it would be a better idea to post here for advice. That's the reason I said less than 5ppm, to avoid any arguments.
I'll try to find all three test kits tonight. What should my parameters be? I'm not interested in doing a reef....well......at least for now.
One more thing. Are all buffers pretty much the same, or are there only a few that are any good?
Thanks