I also have the hydrofarm and right now it's doing a fine job after my thread I have the hydrofarm set to 87 deg the probe is on the inside right over the UTH. the accurite probe is right next to the hydrofarm.
accurite shows lowest on the hot side when off 90-93, cool side is in the low 80's ambient just took a little messing with to get it "right"
this is for my baby rtb.
Chad