cannot find agricultural pumice

I have to re-pot my cycas and need about five quarts of agricultural pumice. Nobody seems to carry it. Help Please!

Where do You live Clause ?

I would have thought most large gardening supply stores would have it. Not using it myself I haven't really looked out for it. Which species of Cycas are you planning to use it for?

In New York, but it is "apartment gardening"
Thank you

You can get it online quite easily.Bieng in an appartment You should wash the white powder off of it ,or it could mark up the ground beneath the container after the first few waterings.

Will perlite not do? You can get a bag of that at most Home Depots.