Hmm if they double in size, I may try to push them to 14 inches before flipping.
Im going to skip topping on this cycle, just grow them out with a little bit of LST. I don't really have the sideways space for topping all three plants.
As for the nutes, they are loving the Fox Farms Hydro. I thought I was using a low dosage at first, but then I realized I was using a tablespoon instead of a teaspoon! Luckily I was planning on going very light on the dosage and it equaled out to suggested nutrients.
I have been using the following nutrients for each bucket:
2 tablespoons grow big
3 tablespoons big bloom
1/2 teaspoon silicablast
1/2 teaspoon calmag
1/2 teaspoon hydrogen peroxide (3% solution)
After mixing nutrient solutions I adjust pH to 5.8
Every other day they need about a liter of water and a little bit of pH down