Well, it's happened again.
I've had the machine set up with 8gal H2O, 25ml 29% H2O2 (lowered the dosage a bit from the previous 40ml), timer set to 1min on/5min off and the temp set to about 72. I've been changing the water every 3rd day too.
I took new clones on 12/29, and on Saturday...