Thanks in advanced for ur replies, I was watering 3 times a day because Im treating coco as hydro since the begining so I dont think is overwatering, I think It might have something to do with a "root bound" kind of thing, It vegged about 2 months in a 20L airpot being watered 3x a day with perfect EC and PH parameters, I have 2 Ph meter Milwaukee Eco and the Bluelab PH pen water proof, both of them calibrated, medium PH is actually 5.6, I double checked yesterday and the EC is 1,2.
Im still looking for help =) thanks to everyone
Anybody else thinks it could be overwatering? cause the plant developed its whole life being treated like hydro in a mix of 60% coco and 40% perlite