I've purchased a bottle of Grotek final flush green apple and plan on using it on my next grow, I'm having a hard time finding any reviewable information from growers about this product. Has anybody used this product and/or is there any safety issues with this stuff. I've from a Grotek rep on youtube it doesn't add any flavors to the finished product, just the smell. Let me know if you've tried it and any thoughts about it. cheers