I'm about to harvest soon.. I read the forums (thanx for all ur help) & I'm about to flush real soon. Can I use H2 O2 Oxidizer for flushing?? I see I bought it about 6 months ago when I got all my nutrients, but I dont remember what the H2 02 Oxidizer was for?????? On my scheduled nutrients I dont have it anywhere??? Thanx again for your help!!