I got the API Reef master test kit, for calcium, KH
, phosphate, and nitrate.
I followed instructions to a T, and phosphate came out to 5.0
the only user error that I may have had was reading the KH
test, I went through 12 drops and still really blue( 1 drop at a time, replacing cap and inverting several times before next drop).
sorry I said no calcium, what I meant was very little, 3 drops and it was blue(around 60ppm).
I also have the API master kit for ammonia, ph, nitrite, and nitrate that I have been using throughout the cycling period. Never have any problem with those.