^^^^^^THAT^^^^^^^
But, beyond that, one application is really all that's needed to inoculate the roots.
Everything else is the old "rinse and repeat" to get you to use it up and buy more.
Check this out:
www.fungi.com
$8 gets you enough for 250+ plants vs whatever you paid for that AN stuff.
Wet
Im pretty sure, Greatwhite is made by Plant success. not AN, however I have read that AN gets its myco from Plant Revolution Inc. the parent company to Plant-Success.
Yes it's expensive, but it lasts a very long time, when used in the manner suggested by Wet.
We will constantly be finding cheaper alternatives to plant food type products, but everyone has to start somewhere.
once your roots are inoculated you should be feeding the myco carbs, Like molasses or some other more expensive brand name product

, and the colonies will perpetuate themselves.
I would suggest using it as directed on the container, but only for the first feeding or 2 of veg and first feeding or 2 of flower.
oh.. and KushMasterKev, I would apply GW, on your plain water days. from what I have read, strong chemical nutes will kill mycorrhiza, so if its an option for you to apply GW seperate from your feeding, thats probably better.