Wedding Cake & White Widow

This week we started mainlining the girls. It is my first grow mainlining, I see that some people cut off the 3rd node fan leaves when topping, and others leave them on. I opted to leave them on as the growth tips were still pretty immature. I am still tossing around whether to do 8 colas or 16. I guess it will depend on how she looks after the 3rd top. I still have it on my list of jobs to modify the grow box and add another 18" of height and it is certainly wide enough for 2 large plants. But still plenty of time to decide. Growth seems to be responding well, I am going to have to start tying things down in a day or two once the stems get a bit longer. I did get some yellowing between veins. It looked a bit like a magnesium deficiency, and I guess they were pretty stressed after being cut in half! I gave a foliar spray a couple of times this week with a little epsom salts, but likely the problem is due to pH. I also gave them a boost this week with a sprinkle of blood meal. Testing the run off ph showed around 7, so i have decreased my feeding pH to 5.5 ish until the runoff gets closer to 6.5. Certainly the plant improved (or at least didn't yellow any more) after the adjustments were made. I also raised the light a few inches, as it was sitting at 18", which is the lower end of the manufacturers suggested height. I have also ordered some Dr Zymes spray, which I will start using once it arrives. It is not available in Canada so I had to use a shipping agency from US.