okay i gave it another shot here, i shook and shook the fnb and did the 8ml per gal into ro(40ppm) and i got a total of 1225ppm and a ph of 5.2, so more or less i think the fnb i have is hot, can someone give me there tds when they use the fnb at 8ml per gallon and if not too much trouble the ph it ends up at, ie. if i drop my tds to say 1100, or 1000 this should leave my ph at optimal 5.5-5.6 yes? and would that be the correct tds i should actually be measuring to, due to my hot batch of fnb? any help would be greatly appreciated. thanks guys, and or gals.