also if you want your buds as sweet and dense as possible, molasses wont do that. your main thing is light. 1000w hps are too hot imo so i use 2 600s in place of each 1000w. i use 30''x40'' cool tubes and a 720cfm exhaust. lots of circ fans also. my plants can literally touch the glass and not burn. also co2 will really help dense up buds. you may also see a 60% yield increase if done properly. but you need a generator or the tanks with a control unit to measure the ppms for best results. co2 pucks and carbonated water are junk, they wont do shit because its such a small increase. also use a hardener to dense up buds. they're basically just a high phosphorus nutrient and usually have sugars/carbs to help the plant take in more nutrients. your main thing for hard buds is lighting though. i wouldnt use anything less than a 400w hps with efficient cooling. people always bitch about the price and electricity but you will easily get your money back. for sweet buds use a sweetener, but if you look at their active ingredients its just sulfur and magnesium.
also maintain a proper ph. your ph determines your nutrient uptake. too high of a ph and your plants wont take in enough macronutrients and too many micronutrients. too low of a ph and your plants will take in too much macro nutrients especially phosphorus, and too little micronutrients. hydro check as often as possible. soil is easier and the ph may even stay balanced if you add enough lime in the soil mix. i dont mix my own soils, i use foxfarm, but i do add lime because they usually test too hot(too low of a ph).