Here are the H2O only plants.
I have to say while they all look healthy, they are smaller than their sisters who have been receiving food and vitamins. I guess that only makes sense, and really it's the end result that matters, but considering there is a 4" difference between the two sets of plants, I would say that adding in vitamins and a little organic food will knock off about a week or so from your veg time.
As far as rooting areas, I didn't take any pictures, but I didn't see a MAJOR difference between the two. Considering the cost of Piranha, Tarantula, and VooDoo, I can't say that I say a huge difference. Maybe in coco coir it would make a major difference since there are no microbes in the soil as opposed to Root 707 which does have a lot of things in the soil already, but I can't say there was as big of a difference between the two.
In my next closet T-5 grow I'll be using Roots Coco Coir and I'll try the VooDoo, Tarantula, and Piranha mix again since I already have it and don't want it to go to waste, so again, one more time....
Nice cross section here:
Q.T. #1 - Red stem, thin leaves
Q.T. #2 - Green stem, fat leaves
Q.T. #3 - Green stem, thin leaves
Q.T. #4 - RIP (second male found)
Q.T. #5 - Red stem, thin leaves (This one is 10" tall like the rest. For some reason, this one is a FAST grower, probably male...