[Gulp35]

I am just about to hook up my watercooling loop but I need distilled water. My dad recommended that I use water from our dehumidifier as it is nearly the same process as distillation. I thought that the dehum. water would be more funky than some distilled from the store but I would be putting in some anti-freeze ( i've been hearing 15-20 percent is good). what would you do?

also how would i go about filtering said water.

my rig....
Cascade
'75 Ford F-150 heatercore
danner mag3 pump
1/2" tubing throughout