Pak Choy starting to put some growth on 
The Pak Choy root system starting to get larger
It’s been 3 weeks since I built my Kratky method hydroponic system. There has been a good amount of growth this week; however I’m starting to notice a nutrient deficiency in the leaves. So I have decided to add another 30ml of the hydroponic solution taking this now from being a half dose to a full dose and we will so how the plants go. Also i have noticed a few leaves damaged from caterpillars.
Here is last week’s update on Kratky method of hydroponics
The Pak Choy are beginning to show a nutrient deficiency 
A small amount of damage done to the leaf by a caterpillar