Just one more question guys, I am wondering if it is a good idea to mix my feed a few days before I give it to the plant? I know this sounds a crazy question but my worry has been that the nutes mixed together a few days before feed tend to have a film on the surface after a couple of days, I am talking about tap water, Bloom A+B Buddhas tree PK and buddhas tree Meta boost with a little Cal Mag.. PH 6.2-6.5 Any feed back on this would be greatly appreciated and many many thanks in advance.