Yes, I use this for NO3 using Red Sea reagents.
There is a long thread on this subject. Search for it.
The procedure calls for some simple curve fitting math.
Even if not perfect it gives you a number for the in between value rather than a complete guess. When compared to the colors the value has seemed reasonable.
There is a long thread on this subject. Search for it.
The procedure calls for some simple curve fitting math.
Even if not perfect it gives you a number for the in between value rather than a complete guess. When compared to the colors the value has seemed reasonable.