Moonshineman soil mix substitute question

Hey there,

Wondering if anyone here could give me a pointer on moonshineman's soil mix. I am currently vegging three girls and they are loving the dirt. However I cannot find the Fox Farms Peace of Mind Fruit n Flower (5-8-4) for flowering. I ordered from an online retailer and was substituted Happy Frog Fruit n Flower (5-8-4) without notice. The retailer tells me PoM has been cut by FF as a product line and to use this instead.

I am wondering if anyone here knows whether this is a suitable substitute? If so do I need to change the amount of fertilizer I feed to my girls? This is my first organic soil grow. My first was hydro, so I don't really have a great understanding of the specific needs in organic gardening. Any help is appreciated and I am more than happy to supply any needed information.

Thanks
 
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