I missed quite a few weeks of this grow, unfortunately. Life has been crazy busy lately! Sadly these girls were not receiving my full attention as far as training and nutrient schedule goes. This is the final week of veg before I flip them to flower! Excited to see how they progress over the next few weeks!
I'm kinda having same problem as you atm. What helped was getting a kitchen scale to weigh your medium bag dry then fully saturated and you deduce the water content for a small plant then you can do proper drybacks and maintenane shots as well as how much she transpires once they pick it up. Note that a standard 5Kg scale won't take more than a 2 gallon and you will probably have to make a stand to properly use the scale so check the scale capacity for your medium but if you can calculate water content you'll do better in a smaller bag.🙌