Al, I wouldn't use coral RX, I have had mix results with that product, it works 100% killing the flatworms but in tree occasions it has killed the coral too. That was enough for me.
I will stick to Fluke tabs you can get them in your neighborhood store they have them behind the counter.
You can deep the corals even if the are encrusted but avoid dipping the entire rock just flip and keep the rock outside the container, the dipping is not long so it is not a big deal.
Once you have gotten rid of the big critters you need to check for eggs, they are relatively easy to find, but you need to know what you are looking for, they are laid exclusively on DEAD acro skeleton, these are areas usually near the base but not exclusive that will have no epidermis (Slime) and these ones you deal with in a different way, I like using a combination of baby toothbrush and metal teeth picker (garf) just scrape them with the picker and finish with the brush, don't worry about hurting the coral, it is dead already in that area. Also look inside holes and crevices.
As far as the fishes that will continue keeping this critters in line, I recommend a Hawaiian 4 line wrasse, I also like the real yellow and green coris wrasses, any of these fish or combination will work good.
Call me if you have any questions.
