Sodium Depleting question

ok this is my second show, i know my sodium for my first show was fairly low, just natural sodium from chicken and some protein shakes; right now im 7 weeks out, and my sodium is at around 70% of my daily value, should i keep it there or lower it to around 40-50%? i remember last time around my sodium was pretty low throughout the whole contest phase and thats why my pics turned out good, however this time im still on track, but from some pics i can tell im still holding much water on my back since i havent cut out sodium as much. i was thinking of decreasing it around the 5-6 week out mark to around 40-50% and keep it there till the last week. then carb up using moderate sodium. any help guys? Mike XXL? what do you think?