Can anyone give me some advice on what I need to test for and a good test kit for my reef tank? I am moving my current 37 gallon reef system from a 37 gallon into a 75 gallon. Currently I am doing the basics...ammonia, nitrate, nitrite and PH. I am adding iodine and a calcium and PH supplement weekly. I've read so many articles on this, and there are many opinions. Thanks again for all your help.