Is this overwatering?

If you are growing in coco and perlite like your diary says you are not treating your coco right. You ate actually having ph issues. 99.9 percent sure. I been growing in coco for a few years. First coco is Hydro in a bag. It is heavy irrigation. You can not over water in coco unless you leave the plant in run off. So you never have to worry about that. You need to treat your coco better for thriving growth. First thing I would do is flush it. 5.8 ph in 5.8 ph out in run off. Then add cal mag and nutrients to about a Gallon of water at 5.8 ph. Refreshing coco with nutes when you apply. Then let drain good. Place under light. You can dump 25 gallons on your plant and let it drain good and if ph, and nutes are right it will thrive. How I grow half pound plus dry autoflower harvest at times. You need to do your plant at minimum every other day. Every day is best. Keep all coco wet always. It is Hydro in a Potter or bag. As you go if your ph starts to climb in run off you need more nutrients. If ph goes down in run off you are feeding too much. Select my answer and dm me if you need proper help.