It was interesting. But PPM is over my head due to the fact that I am mathematically challenged. Is there any way to translate that to drops of MG per gallon? I've been using meth blue on my eggs but could easily change to Malachite green. There is a product that Tammy swears by. Others have had success with it as well. I can't remember what it's called but all it is is Salt and Malachite green.