Or Walmart....it should be readily available just about anywhere...

I'd use pumice if you can get it insead of perlite perlite breaks down into dust and just doesn't last that long. The weight of the pumice keeps the plant tethered better. Like to try the CHC myself have heard it used for oplumeria too which also like a very well draining mix Have heard its bad to get soil gradient diffeerences from one medium to another creats a slow moving line I have to repot a new navel thats in a 5 gal and the soil is heavy sand. Its already been staying to wet and I haven't watered it since I got it a week ago So would it be ok to gently remove all the old soil or most of it and establish the roots in a uniform better draining mix? I add pumice to supersoil and it seems to work but will have to look into the chc Thanks

You can also try to call Midwest Perlite and see if they can help you locate what you need. Many of the finer grades of Perlite are used in industrial (hot topping) and construction (loose fill insulation)industries. Keith is the owner of Midwest Perlite and should be able to help you out. Here is a link that might be useful: Midwest Perlite webpage

Do a search of local garden centers, and start calling or emailing. When I was looking for pine bark fines, I just searched up a bunch of places, and sent them all emails. I got replies the next day and had my fines. Joe