If the shelf life is only 6 months after the bottle is opened, then it would definitely be a waste for someone like me who only runs once a year...unless I used the whole bottle in one run.
But does this stuff mess with any of the terpene production or anything like that? My understanding is that it makes phosphorus more available to a plant...but, other than increasing yield a few % points, does it mess with the flavor or other chemical compounds in the plants? I know Growmau5 has mentioned in those CrazyDago streams, that his own stuff doesn't come out tasting as good as Pedro's stuff...gotta wonder about that. I know Growmau5's lights are better than Pedro's...so it couldn't be that! I know that Pedro is an organics guy....gotta wonder where that better flavor is coming from!