I couldn't find Schultz' APS but a nursery that specializes in pond stuff was recommended by a several people. They didn't have Schultz' APS. either, but had this brand:
I repotted many of my pings into this and when the pots hit the water there was this fizzing noise and I could see "smoke" emanating from the pots. Is this normal.... or did I just sentence most of my ping collection to death?