Your use of pumice prompted me to start looking into it and I think I'm going to give that a try next run. I used straight from the bag FF CocoLoco for my current 1st grow and the main complaint I have is that once it gets wet parts of it get really dense. I'm pretty sure amending with the pumice will do the trick so I was wondering if you do a 75/25 split on your soil to pumice ratio?