Purple stems!

[fireboytommy7]

I noticed that my stems are turning purple. I didn't have this problem before. I started using Cannazym and seemed like it triggered the reaction. Anyone know what it means?

Also on my purps, the one the right, the edges of the lower leaves are turning yellow and brown. They are also having the claw effect. Please, if anyone could assist me.

 

[fireboytommy7]

Heres a better pic. Where the purple comes up it affects the fan leaves connected to it.