Not really wanting to become a part of the debate, just popping in as a first hand user of both the RTN Prevent and RTN Stop. Over the last few years I have noticed a roller coaster in my SPS tanks. Accelerated growth occurs, everything starts looking better then ever, parameters do no fluctuate, and then out of no where one or two of my nicest high end pieces will start to STN or RTN. As everyone else, I frag...glue...drip... place back in the tank. Sometimes they recover sometimes they do not. Recently, i was given some of each product and was told like everyone else, this will resolve the issue. First, I tried the dip because I was not comfortable with putting a chemical in my tank full of acros. I followed every direction the product specified down to the letter. Even repeated every two days. No change in results. Some pieces lived, some died. Eventually I was convinced to try the in tank treatment. I was told to place a bubbler in the sump to add extra oxygen to the water and it would not harm the livestock. With in hours of the first in tank treatment, 2 of my nicest monti’s were completely ghost white with PE. I brought up this concern and was told it could be part of the process of ridding sick coral of said parasite. I completed one more in tank treatment and put all the product right in the trash. Not only did the in tank treatment show no signs of “prevent” in whatever could possibly be causing the issue. It bleached the same to Monti colonies and killed one of my acro colonies. As for the dip, I figured I would give it another try or two since I didn’t have much left... I started noticing after pulling a sick coral out of the dip the tissue almost looked like it had been burned off the body. I tossed the rest of that in the trash as well.
As for the debate and research, I hope someday a true solution can be found for the issue. However as a consumer / SPS dominant tank owner. I think this product does more harm then anything.
