First Grow - THC bomb flowering - need advice! (pics included)

Hello fellow marijuanaphiles, this is my first grow I am attempting 2 THC bomb plants under a 400W HPS. They have been flowering for 3 weeks now. One plant stretched a LOT and is about 4 ft while the other is more beefy at about 2.5 ft. The taller plant was burned by my light about a week ago because it got too close to my light. One of its leaves is curling up and turning a little more yellow each day. It has also budded a little slower than the other plant.

Should I snip the yellow leaf off or let it be? Will my yield be significantly affected or will I just have to flower the plant longer? How much distance should I be leaving b/w my plant and the light? It's about 1.5 ft away now.

Also, I am using FFOF soil with Fox Farms 3 pack nutes. Now that I am almost a month into flowering, should I step up the nutes? Up until now, I have been following the directions on the bottles (2-3 tsp of tiger bloom and 4 tablespoons big bloom per gallon of water).

I'm really happy with how my girls are doing with my limited grow experience, and it looks like I might have close to an ounce already. My setup is pretty ridiculous b/c I set up a pully in my shower and I am using the built in exhaust in my bathroom... lol, just check out the pics. And, sorry for all the questions.:weed:
 

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