I use it from start to finish and yea it should be the first nutrient to add to your water..ie it should be added 1st before anything else...I have to say I don't know if it will lock out the other nutrients...I'm just going by research I've done and what I've seen and read...
Hey bud, so you give it to them every time you wet them? I have been adding it only when feeding supplements not when I feed them nutes. How many ml per gallon are you doing? Thanks