I would recommend the red Sea calcium, alk, and mag tests. I use API for nitrates. I have the salifert phosphate, Cal, alk, and mag right now. They are a little more cumbersome than red Sea. They are more expensive as well. The phosphate is not strong enough. I never register a color change. I will be doing red Sea next goaround. I never tested for ammonia or nitrite, as if you have nitrate, they should be good. I waited months before I added lots of stuff and I transferred an established tank to my tank. I figured at that point ammonia and nitrite were a waste of money.

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