Close you blumat on arrow further, everything looks a bit too wet for me, as there are algae growing on your perlite just under the dropper.
good luck
CC
hey man, thanks for pitching in. how do you set your blumats in coco?
I watered them until 20% runoff, then waited a day or so, put the blumat in place and set the drops to 1/15-20 secs. Is it possible that my coco perlite ratio (50-50) is somehow causing the blumats not to work to their full potential?