What do you guys think about jacks 2 part.I have just started using it but it really seems to be working very well. And the best part is the amounts only 1/2 teaspoon per gallon of water.Another thing is u use it from start to finish. From veg thru flower.the only thing is that I have not yet tried it on auto's. If anyone has ever used jacks maybe you could give us some feedback .