I'm pretty certain that Elite Aquatics has some Flatworm Exit.

How small are these 'slugs'. My zoos have nosedived, and I've lost or am losing the majority of my zoos. I've searched, but do not see anything...

I bought a zoo rock from hidden reef a month ago, and within a few days from going in the tank, the zoos snapped shut. Couldn't figure out why until, about 3 days later, I saw what looked like a nudibranch climbing across the front glass.

Took the little sob out, lo and behold the next day my zoos were out saying hi.

I got lucky, dip that sob asap before you're sol!

Ok??? ;)

Well, it might not be a Nudibranch problem, but if it is, they are around 1-2mm in length.

Remember these guys eat zoos, and when they eat them they take the colour, causing them to deftly blend into the surrounding area.

So they may be there, but also may have consumed the coloration from your zoos they've killed, etc.

Viscious circle, those lil buggers!!

nudis
 

best way to get rid of these guys is to suck them off when you see them.or FW dip the rocks if you can.they are aeolid nudis and if you google them theres a lot of info.Clint

I've dealt with those nudibranchs several times also and have had success with repeated FW dips. In my case I am much more aggressive than previously suggested. I take the rock/colony and hold it under the tap for about a minute, letting the water jets shoot in between the polyps to blow everything out. Strong medicine to be sure but several repeats of this does eliminate the nudi's.