Agreed, I mix them too, and am quite happy with the results. Also, either will work great on it's own, i just mix them because i feel like it.LOL I also agree that OF is a little rich for the young ones, although alot of strains can handle it just fine. Never tried the Happy Frog on little ones, so i can't say how that would do. I'm guessing it's about as rich as the OF, but not positive. I hear of alot of guys using Light Warrior for the little ones, with good results, so that might be a good idea. I'm going to pick some up the next time i hit the hydro shop.