My Fastberry's fan leaves seems to be turning...

can get fast feedback on nutrient deficiencies or stress by posting a photo to buddy.kindbot.io

Up your cal mag and double check your ph looks like a mild cal- mag + ph you are in coco so you should nt have any bugs i would do a feeding are 2 with just ph water cal-mag you will tell in a day are so if thats the problem put your ph to 5.6 for the feeding and check it out👍👍✌️✌️🍻🍻

Looking at your plants I think you have what is known as Elephant Foot, it comes from rotting the root hairs and or not having enough roots going into flower... You have been overwatering most of the Grow by my review of your diary... the differant macro and micro defeciences your seeing in your plants is due to not having enough root hairs to absorb nutes ( from root rot most likely) have you had bugs? If you have gnats then my guess is spot on.. check for them Hope this helps.. FYI: I mean no one any disrespect, we all have to learn and have been there. Just trying to help

What is the power of a lamp? lift from 20 cm. Feed on the table Canna Coco. Very little food for plants. at this stage it is necessary to give 3-3.5 ml/l

It could be a lack of nitrogen but the veins are still fairly dark. I believe it is more. Since you have switched to flower I would associate it more with a PK deficiency. Good luck on your grow!

I'm thinking light burn as your LED at just 6cm from your plants is very very close. Last week and the week before, 10cm. Not sure what wattage (real or advertised) your LED is though. I'd up the ph a little as well to 6.1.

The first 3 weeks of flowers, the plant stretches, gaining a growth spurt, and a massive need for nutrients, specially nitrogen. Up your feeds to 1.2 EC (600 PPPM).

Definately nitrogen lack...i would try to get temps to 25c during light on and get 18on and 6 off- let the plant rest (and also your led panel)

Yep, it is loo'ing like nitrogen def..