Reddit mentions of Nature's Footprint Pumice Soil amendment, 5-Gallon

LOL I refuse to paint flames bahahah!

And the top-dressing is red crushed coral, but underneath is my own mix of half pumice, half coconut coir-I found it to be the fastest draining mix that keeps my plants happy :D

I have read that some people drive over them with a car. Other folks have even said they have just given up on breaking them down. They toss them in whole.

1/2 inch isn't too bad, really. The ones I have are about 1 - 1.5 inches. I think I'm going to toss them all in a 5 gallon bucket and drop a sledgehammer on top of them. I personally would like to see them 1/4" - 1/2".

Remember there are other types of aeration. I'm also going to use rice hulls from a local beer craft store. I'm also kicking around the idea of using activated biochar (it's aeration and good for soil life). Hence, my 1/3 aeration is going to be mix of things.

Also, someone sells pumice stone on Amazon:

https://www.amazon.com/gp/aw/d/B008YSVPHW

The problem is it's like $30 for 5 gallons. That's not even 1 cubic foot. It's fancy, don't get me wrong, but jeez.

Anyway, good luck with your soil build.

Hmm. I just searched and found this one for $21.41 per 5 gallons. One 1-star review said it was 60% fines, which is a good thing if you're growing mesembs!

EDIT: some other reviewers are saying they received less than what was stated though, and that the pH was too alkaline or something.

Well,they both have just the dirt I got them in for their soil. That soil is suspended in the pumice for airflow and drainage. I'm not sure what will happen as the roots start to outgrow their soil. Either Ill have to add soil, or the roots will take hold just meandering through the pumice without a real medium. Example pumice Link