Why is King eds instant ocean so much cheaper?

[Aquattro]

Wayne got a bucket same time as mine. His tests much closer to IO. Mine is way off. So is Greg's. It concerns me that the levels are all over the place. I spoke to the Coast distributor this morning and he says they(KE) get it from a legitimate supplier, so who knows. But I've used this stuff for 20+ years and never got Ca over 400ppm!