Any ideas what's causing this?

[Haunts]

Hi everyone. I wasn't sure whether to post this in the infirmary or here as I'm using megacrop.
This is my second grow using MC my first grow with it went fine but there's a few areas in my plant where there's some yellowing with purple edges. See below photos.
I've been following the feeding calculator which tells me to use about 2g in 2 litres of water, along with 1g of sweet candy.
Soil is biobizz light mix.
65w Quantum Board on 24/7
Temps 23C, humidity 40%

 

[Nosias]

You should post this in the infirmary. How old were the ladies? It could just be the end for them as in they are getting to the end of their lifes.

 

[Mizzo81]

What strain. If it’s got color in its genetics this is the time she will definitely start showing it.