Hey Dr. Tim, I have a 180 gallon reef tank and I have been fighting cyano for about 2 months now. I read about the Re-Fresh product and I am really interested in trying it. The problem I have is that I have 5 shrimp and some snails. Has anyone tried this product with these creatures in the tank? It is not possible for me to remove them, due to all of the coral and live rock. Any info would be greatly appreciated.