well that's what im trying to get at i guess ?? im mixing each batch EXACTLY the same way EVERY TIME so theoretically they should be the same ?? i don't know how much swing im going to get until i measure the Alk the next day and see where its at ? i shouldn't have to keep adjusting dosing amounts with each new batch ?? i would think it should be pretty close so minor adjustments ok but to go from 8.2 up to over 13 doesn't make sense to me ?