will this work as substitute for bushmaster

http://www.iherb.com/Fine-USA-Trading-Inc-Kelp-Root-Extract-300-mg-300-Tablets/22822

would this work and it it would how much do you think i would need per gallon? or should i just fork out the cash and go with the proven bushmaster. thanks to all in advance

get bushmaster their is no substitute

nothing like it?, or is more than just sea kelp extract that makes it the thing to use?

Yeah, Bushmaster is the only product I know of that both stops vertical height and shortens flower time effectively. I know there are hundreds of people here that are against using bushmaster for health purposes and to each his own.
I'm pretty confident there is nothing like it. Be sure to supplement with MaxiCrop, per advice of the bushmaster creator.