Hey guys,
I have this on a leaf... yeah, on a leaf on 7 plants. I changed the CO2 bag yesterday, it's hanging pretty much above it.
Unfortunately, I don't have a diary for this grow because it's pretty chaotic..
It's a "philaenus spumarius" a spittlebug. It's bite causes minor direct damages (little discolorations). On the other hand, it can be a vector of some serious fungal or bacteriosis diseases. Get rid with natural pyrethroid