Should I get the Phosphurous Checker?

[theokie]

Should I be getting the Hanna Phosphorus Checker? Now that I'm using LaCl more regularly, on a doser, my Phosphate checker consistently reads 0ppm. Is it worth it to get the Phosphorus Checker that will read down to ppb? Or should I just alter my dose so that I can get a detectable reading on my current checker and just adjust my maintenance dose around so that it reads 1ppm just so I know that I'm not over doing it?

This is for my SPS system, I've recently started to move all of my LPS out of it and about 80% have been moved over to the new LPS system. As I'm attempting to see if I will have better success by no longer trying to balance a mixed reef.