I started dosing N,P,K a few weeks ago after being afraid that P ans N would make my hair algae problem worse. After listening to the guys in this forum and then dosing, the algae left- like immediately. It was amazing. Anyway, I would test each day to start so you know where you are and no how much more you need to dose. After a while you will get a feel of what to do without the daily testing. As far as test kits, I have Lamotte as that is what I have left over from the reef tank days.