You got me Huntley...Hydroplex is the only bloom booster I've ever used so can't say but I have heard some good things about "kool bloom" and it seems to be popular but can't speak from experience. Another one is Gravity by Humboldt but that one actually scares me.......I've seen people ruin some crops using it because it's pretty strong stuff.

I've also never tried the WW YET.....I actually enjoy GROWING the Master Kush more than smoking it. I've been on a search for more "up" high's and I don't really count MK among them but can't compare it for you until I've actually tried the WW....couple more weeks till then..........sigh.........

PS.......Here's a photo of my girl in week 4 of flower.