So I have a reef friendly tank. Adding more coral and reef type inverts often. I would like to know what test kit is best for ammonia, nitrates, nitrites, phosphates and so on. I see a ton of posts that have exact numbers when all the kits I have give a range and you have to match a color. So am I missing something or is there a better system out there? I have a 125 gallon with a cascade, an emperor HOB with a under gravel filter for my throwback old school habits.