I use the Protekt. I don't like. It raises my pH too much. I wear gloves when I mesure it, burns a little (for obvious reasons) It also has a bunch of K that I'd rather get from something else. I have seen noticibly stronger branches but I don't think it's worth the effort. I would never consider running this in hydro except as a pH up. Hydro branches are usually strong enough. Someones said that the Rhino doesn't raise pH. AN tells you that it will. I wonder what's up with that.