It began with a few bended upwards leaves tips, I've noticed them yesterday. Now leaves becomes reddish in the middle between veins (look at the photo I pinned).
Help me, please. What problem is it? I literally crying for help!
Could be a phosphorus defficiency. Before doing anything, I would check the runoff waters ph and ec levels. Make sure everything is in range for the substrate your using. Make sure it isn't a lockout issue before increasing your bloom nutes.