As I gather it, they have some much bigger units intended for mass production of the fluids, they're keeping them running full time, I don't know that they're building more of the massive sized units.
So I believe their Large Volume systems are referred to as LVH ... Large Volume Hydrolyte. In speaking briefly today with Marion Sofield, Chief Financial Officer of PCTL, I get the impression that Hydrolyte is the fluid that they are currently making in large quantity, and that they make 2 versions of machines: "Legacy" and "Rack".