This is my first post here but I've been reading the forums for quite a while. I have already tried using the search function to answer my question with no luck. As a matter of fact, I haven't had any luck with finding info anywhere on my inquiry. My 6 clones (2-AK 47, 2-trainwreck, 2-skunk red hair) that I've vegged for about a month now are ready to be tranplanted into 3-5 gallon pots for flowering. So, I went to the grow store and bought some ProMix, as that's what I always used to use 5-6 years back when I Was growing last. The bag I got is labeled: ProMix Mycorrhizae, not ProMix BX Mycorrhizae and not ProMix HP Mycorrhizae. So, my questions: first off, has anyone used this as their medium? What is the main difference between the regular and the other two products (HP and BX) in regards to growing cannabis? Any tips or experiences you'd like to share? In All of the searching i have done on this forum and the Internet in general, the discussion is always between ProMix BX and ProMix HP. Many people have talked about how they have had pH issues with ProMix and I'm worried since I don't have much experience in correcting pH problems in all the past grows I have completed. I suppose I have been lucky in the past cause the three grows I have done all went well. This time, though, I am planning on trying to do a perpetual harvest SOG grow (I've got 4 clones of each plant in the humidity dome and close to rooting) and I want to make sure everything goes perfect. One last thing; should I see about exchanging my 2.8 cf bag of ProMix Mycorrhizae for either the HP or BX since that is what most cannabis growers seem to use? Thanks in advance for any help.