I think the only difference is that Ornamec 170 has the surfactant in it already and the regular Ornamec comes with it but you have to mix the two together before use. They are both concentrate and have to be added to water unless you have found a small ready to use bottle somewhere.
I have ordered from here in the past
http://shop.wildseedfarms.com/...
This is the one I buy at the COOP now
Maybe this stuff works different for different people. It says in the instructions that it takes more than one application to get a complete kill and I have found that to be true but it will certainly stunt it with the first app and kill some of it and usually kill it with the second. I love this stuff!!!
