You must mix all three to make a complete mix of nutrients. DO NOT mix by themselves. Always add them to a gallon of water or your whole rez. Your plants did not turn out good because they were seriuosly missing nutes in each stage. I run the Lucas formula for the whole grow . Whitch is 1 part micro to 2 parts bloom. Bring the ppm's up as they go to flower. Instructions should be on the bottle for the mix of all thre. Please do a search on here for the mix of each stage of growth , it is here. Into the flower stage the mix needs to have less nitrogen because that makes veg grow.