Just started but doing alight but still would like any advice

So i am growin with a 1000 watt hps setup in a 6x6x6 tent got 3 strains tahoe og, blue dream, sweet tooth. i vegged for 30 days and now have switched my light cycle to 12 12. i go with age old nutrient line with a cal mag addive for veg and i just bought the age old bloom and i got some rapid root snow storm and the cal mag should i be using all the nutes going into flowering or will it be too much do you think of course i not using the veg cycle nutes but im in 7 gallon pots 3 plants there about a foot or two with stocks the size of my thumb and are lookin great but if anyone can suggest anything i could use to make my shit real dense and thanks to all. i will have pics in my gallery later the one i have they were still in 3 gallon and at 15 days the have tripled in size by now though so i need to update.

I hear gravity by Humboldt. If used under the recommended dose works well to increase density.
No experience with it tho. I plan to use next grow

Mollases last 3 to 4 weeks always seems to swell my buds up and put weight on them it seems 1 to 1.5 tblsp per gallon of water once to twice a week depends one if your strains like it or not. Its also beneficial for your soil and it does have nutrient value to it. The kind you want is the unsulfured kind grandmas mollases is good i use the blackstrap mollases its pretty beneficial to the plants

i second molasses, I did half with and half without and can tell the difference. They get stickier and thicker, the sugars in the molasses help bud production.