Should I worry about the white mold on coco's surface? I had them before in my grows,never seen any damage caused by it but still a question in my head. humidity %60,direct air blowing to the plants,watering every other day,temps 27-28C.
I don't think so it's quite normal, maybe you store your coco in a dodgy place when not using? Or in a damp place? Or is just a fungus, I have this sometimes growing in my compost (which isn't good) I have also seen it grow on an opended bag of horse manure. But like yourself it never hindered by grow š±š
Iād scape off dently so it doesnāt spread and to prevent you could water plants after the top of soil has gone dry and crusty looking .
More air flow will help create - nice crust and plants should start eating up more water so you can perform a really good sponge effect with your soil / root ball system .
If you thing you have plenty of air flow reduce your watering frequencies
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Mycelium goes away fastly enough and looks like spider web u could say...and it's not harmful for the plant, it's normal fungi created from the reaction of the bacteria inside of your medium (not chemist, don't shoot me if using wrong terms)
Since the spot is very small you could just remove it to be sure.