I've been having MAJOR problems with algae, fungus, mold, etc in my little grow rack and it has been suggested several times that it could be due to poor air flow. I have a humidifier in the rack itself and had hoped that the movement from that would be enough air circulation, but alas, I still have problems. I've been unable to find small fans that will work in my rack, so I'm wondering if a single bigger fan will work.
So the question. How much air movement is too much? Does it become disruptive to the plants to be under constant wind? What are solutions people have implemented here successfully?