Aside from the benefits, what are the risks or adverse effects to be found from using too much rooting hormones, such as SuperThrive or KLN? 2 drops per gallon vs. more than and, the frequency in it's use? For one, would it/could it cause root burns or, mutant growths? Should this be used regularly? Once in a while? During particular growth cycles? Has anyone really seen a difference by using it, negative or positive?