I have used my way without burn at all. I have grown Chocolope, Kushberry, Jillybean, Sour S all with fantastic results. The key is to just water it and not add any nutrients. Sorry you had a bad experience.
Would you like to flower from start to finish without adding, measuring and mixing nutrients?
With Subcool Super Soil, you can go from day 1 to harvest with just watering your plants as they need it.
More information can be obtained here...
Its about professionalism. You wouldn't want the pharmacists 2 yr old around your medication right? Besides, gut feeling is that the 2 yr old is going home a cpl grams heavier than when he came in.