Big Bloom. I was using that one from day 1 til chop. It is said to be 100% Organic also has worm castings. The old head back in the day at the Hydro store swore by it. He said it would not burn the plants so i was pretty generous with it. It s kida pricey tho.I just thought about this one. If you look at the FF 3-part, one of those three is basically an organic-ish tea. The other two are pure salt. I think the big bloom is the one that is just guano and kelp and whatnot. There's your flavor.