I have experience with both natural chemistry and ahh-some ,along with a few other products which I tested awhile back. FYI this kind of testing requires lots of time and thousands of gallons of water but in my situation I satisfied myself that i had the right answer. the bottom line is that natural chemistry did produce a result in my test (it released a small amount of biofilms). However, I followed the natural chemistry purge immediately with an ahh-some purge and was astonished at the amount of additional material released - left behind by the Natural Chemistry. if anyone is interested all the gory details pm me and I can provide a link to my page where I presented my experimental method and results (its a long read), so as not to clutter the forum here. Bottom line is that the Natural Chemistry works "a little" but ahh-some so far outshined it that it wasn't even close.