Fluid retention driving me mad for weigh in

[rocknRIGGAR]

I'm a out 8% BF and 75kg ripped .

I'm a pro fighter and have to weigh in every Sunday morning. So when I check to see how I'm going on a saturday morning weigh in some times I'm good and where I need to be weight wise!
Then on a Sunday I'm a 1 kg heavier and that's with me carb depleting on a sat also!
I know my body and drink prob to much water! 8+ liters a day !
So I'm putting the blame on my my extra weight weigh in on fluid retention !
I want to keep my bf real low diet is super clean!!

What else would u recommend for me to stop fluid retention ????
feed back would be greatly appreciated & thank you .
Riggar

[GirlyGymRat]

r u eating salty food???

a good diaretic perhaps...water just messes up my mind too!!