I know this is going to sound crazy, but this is how I got rid of some Zoa eating Nudis.......... I had a serious outbreak of those things.
I dosed my system to near death with calcium, and invert food. the PH
dropped to aroung 7.5 and the nitrates soared to 200ppm.
I left the tank that way for about a month and did absolutely nothing to it except crush and nudi I saw.
During the month that I left my tank that way everything looked like it was struggling pretty bad, nothing opened up fully ever really and a lot of things looked as if they were dying. eventually, I added some maco and did a couple 50% water changes and the ph
and Nitrates evened out.......... I have been Nudi free for about 2 months now. None of my corals died I have LPS
, 1 SPS
, and softies.
The way I looked at it was like this:
the Nudis that people buy are super hard to keep and die almost all the time. If that were the case then more than likely they aren't going to like horrible water quality. I found out that they don't.
I'm not reccomending you do the same thing that I did and I am not even expecting to not get flamed for the way I got rid of them, but that's how I did it.
Take from it what you want, I'm sure you can figure out a way to get rid of them.