I also have crazy PE from selcon. I started using to help a fish recover from a little battle wound he got from the LFS, someone suggested adding it to my fish foods, to help boost the fishes nutrition, so I gave it a shot, and I noticed right away all my corals reacted to it being in the water. Must be something positive about it. my fish healed up pretty nicely also. I know it's anecdotal but I believe the stuff it great for fish, and corals. I add .5ml to a block of frozen foods or to a pinch of NLS.