I'm running something pretty similar to you. I doing DWC with 5 gallon buckets, 10 inch net pots, GH air pump, and 6 inch air stones. I do individual buckets. They are not connected and no reservoir. I use GH but not the lucas formula. I just use floramicro, floragrow, florabloom, and koolbloom liquid. I use flora nectar and koolbloom dry on the last 3 weeks. Koolbloom dry where the magic happens and gives you bigger buds. I top off with just ph water and change the res with new nutes once a week. I'm also using a 4.5x4.5x7 tent and a total of a 1000 watts but 600 watts is with a hps and the other 400 watts is with an mh bulb. Both bulbs are in an air cooled growzilla reflector. For the liquid koolbloom I just use 1 tsp per gallon and somtimes a little more but no more than 2 tsp per gallon. The amount I use depends on how big the plant is. If I put them in under 2 ft then I just use 1 tsp per gallon. But if I put them in bigger then I start with 1 tsp per gallon and go up as it gets bigger but I never go over 2 tsp per gallon. Just keep an eye on the plant to see how much it can handle. For the koolbloom dry I just follow the instructions and use 1/4 tsp per gallon and never more. This is strong stuff. As for diamond nectar, I don't use it. I also don't shut the lights for 48 hours. I just go straight to 12/12.