Brilliant Water Solutions
O-Zapp Advanced Oxidation 
MicroZapp Nano replaces sand and nutshell. This novel media has been extensively tested on a variety of applications mostly replacing sand. The surface treatment effects the backwashability as well as the filter efficiency. The easy release of oil as well as solids during backwashing, together with the coalescing effect when oil accumulateds at the surface makes this media very usefull too for replacing nutshell filters
MicroZapp at a crude oil plant reference
MicroZapp data sheet
MicroZapp MSDS (english)