Thanks i'll make sure to check it out once i get it. I will be taking measurements of PPM if thats what your asking? at the moment i have no way to test it. when i water tomoro i might get distilled water and use that untill i can measure. he said he keeps it at 350-400 and i should keep it around that because they like it. So hopefully the distilled water will at least be better than my tap water.Do you take measurements? If so, you can use Herb.IQ to keep track of all things grow-related, and encrypt it to a solid standard as well. Software was written by one of RIU's own Back in just a lil' bit!