Leaving the tank free for the required period does guarantee it. Not sure the time, but they do die out, just like ich or velvet.

The only way is to remove all the acroporas and dip them and put them into a quarantine tank for at least 2 months.The quarantined acros need to be inspected and redipped weekly,removing any eggs.Any encrusting on the rocks has to be removed.If you don't break the cycle the new eggs hatch and it starts all over again.

Do the corals survive this? for 2 months that mean that one must have a good stable mature tank with the same lighting for 2 months and the corals being fetch out and dipped each week, must be very harsh on them.

I hope I never get that crap. copper poisoning is enough nightmare for a lifetime.

i used something called flatworm rx and it worked... it took alot of treatments and my corals were not that happy at the end but nothing died and i can't find any flatworms.

i also added a sixline the eat any that might pop up again in the display

natural way we won a couple of years ago was suck out as much as you can, and put the following livestock in;

In order of effectivness in my opinion.

Melenarus wrasse
Blue Velvet Nudibrach
Yellow coris wrasse
mandarin goby
six line wrasse

haven't seen any in either our LPS/SPS in a long time

How did you suck them out? They live on the acros and blend perfectly with the tissue coloration.
You might be thinking those red flatworms that grow all over the sand and stuff...

So tonight im gonna dip every peice in my tank in coral rx. Do these things only go after acros or do they eat all SPS? Cuz ive got a huge supernatural monti thats encrusted onto the glass and overflow that i wont be able to get off without scratching it up... Also alot of very delicate birdsnests that will be in a million peices

Only acropora..

yes, plus the black velvet nudibranch don't do on any coral. They are sort of repulsive on going on corals, at least that was my observation, plus they are totally uncompatible with strong flow and pumps.

I had to lower my flow quite a bit and put nets over my pumps and they would still get stuck on them.

Whatever happened to greenex. I had them many years ago and just greenexed the tank. Did not lose anything including coral, shrimp or fish but I didn't have any SPS at the time. Worked great, but turns your clear silicone a green color. Do they even sell it anymore?