[honest mark]

so i filled my fresh water tank up with blue food coloring to see if i could find my leak, i could not find it, the water level in my fresh water tan seems to go down, i dont use sinks or shower only the head, if i only turn on pump #1 and pump #2 and then leave the pumps on i do see the waterlevel in the tank go down, if i only turn on the pumps when i am using the head i dont seem to have as much water loss in my tank? if the leak was coming out of the tank wouldn't i have blue water in the bildge? the water is crystal clear? i checked my shafts dont seem to be leaking, have checked all the 15mm pex tubing in the boat, cannot for the life of me find the leak, if it was coming in from the lake the water in the bildge wouldnt be as clear as drinking water would it? anywhere else i could check, the amount of water i am talking about is about 2 inches, not enough for the bildge to kick on, when i get in the bildge and use a shop vac, suck all the water out,  the water comes back from the back of the boat, i checked under both fish boxes, cant find any leaks, im stumped???? HELP...