I'm not a chemist so I get lost in the alphabet soup reading labels and trying to compare them to the actual chemical structure of compounds and I was looking for a little help. I have all 4 of the Purus d/s and was wondering which would be best to use on a pulse. I found out Halovar is a bad choice so that leaves Nasty Mass, M14EE,and E-Pol. I'm thinking it's the E-Pol but wanted to hear from the knowledgeable people here--after all, I'm just a laborer. (Lucky to be employed at all!). Thank you