Opie, I'm a little confused bro, are you asking if flushing at the end makes any difference in final product yield or taste?
And I am not able to answer the difference between organic and organic based, except to say that I think the moniker "organic based" may be telling us that it's a combination of organic and chemical ferts.....?....maybe one of the folks on here that know ferts really well will chime in?

I can't answer that one fsunoles. But I would be interested in opinions of those who have used it.