2001 3500 tiera exspress

[Bucky]

Good day all, I'm new to the forum and new to Tiera Yatchs. Boating most of my life, last 12 years have been Trawlers. I'm finding a lot of things confusing on this boat. Ill start with one thing at a time.

I fill my 120 gal fresh water tank by the end of the day it's empty. Fwd bildge is pumping clean fresh water out. I can not find the leak or see where it's coming from.

Any and all suggestions would be helpful 
Thanks, BC