Need some advice, possibly need to add something.

I am growing in a 4 gallon bucket with a 4 out pump with airstones. 150 watt hps and a T5 on the side, I rotate the plant daily . Nutrients are GH 6ml micro 16ml bloom, 15ml botanicare sweet per gallon, and I recently started adding humbolt gravity. I also use hygrozyme in the water. My ph doesn't change much, is normally 5.9-6.1.
The girl is about 9 weeks old, 5 veg and 4 1/2 12/12. I started to see some minor things lately and was wondering if it is normal or I need to add some nutes or take some away, I don't use a ppm meter. I am also seeing some brown in the leaf like a possible magnesium issue. Is the first plant I ever grew, came from bag seed. Any advice appreciated. I figure she has about 3 weeks to go? All the tirchs are clear now.

It is one plant with 8 tops, I broke the main cola off the first week in 12/12 and all the side braches competed to get to the top, so now all of them are the same height give or take a 1/2 inch. The middle one is a double top(where I broke it)

looks ok mate, but cant see good in pic

Ok, I'll try to get a couple other pictures, is hard with the hps on since the orange tends to cover up and defects you could normally see. I had to take those at night with the flash.
I just edited this and added a pic..can see little circles around the veins. I didn't know if this was normal for 1/2 way through 12/12 or not. And a few now show a lighter color in same area.