Zoa killing pests! What is going on

[mkart]

I think I am learning the lesson of what happens when you build your system out of other peoples failed attempts or problems. I bought about 450lbs of rock from 3 different people. Maybe 30-40 pieces of coral from 8 or so people and a few from my LFS. I dipped nothing until this last week when I bought several pieces from a frag swap.

I have flat worms in my frag tank for sure and bought a Blue Velvet nudi to eat them. He's been missing for 4 days and I am going to use flatworm exit tomorrow. I have some red slime algae that came on a few pieces but it seems to be slowly going away so I am not worrying about it yet.

I have aptasia and started hitting them with the store bought mix this evening.

I am pretty sure that the second picture is a mojano anemone (sp?). I can see 6 of these at the moment and this is more than 2 weeks ago.

The big worry of the day is my zoa colony that is 50% destroyed in one day. This rock was completely covered when I bought it. Now the whole right side is either missing or has large swollen masses surrounding them. I did a freshwater lugos dip on them this evening and hoping for the best. Any idea what this is? I don't think it's nudibranchs but am not sure. I pulled all the swollen masses off and left them in the iodine dip, I'll look at them closer tomorrow. Anyone seen this? Should I be dipping all my corals from the DT? I will definitely be dipping all future purchases!

[RcToners]

Hard to tell from the photos. If it is zoo eating nudis you're in trouble

They blend in to match what they eat so its hard to see them. A dip in some water with a few drops of flatworm exit along with lugols helps, just be sure to swish really really well before pulling it out. If there were any nudis youd see some fall off into the dish. You could also look for their eggs, they are white and they lay them in spiral patterns on the stalks and between the stalks.

Hopefully this isnt what it is.

[100%hydrophylic]

the zoanthids looks more like a sponge or fungus issue.

[mkart]

Well I removed this rock dipped it in Lugols and shook off a bunch of little worms, copepods and a white thin legged star. I also pulled off all the globular masses I found. Placed it back in the tank and the next evening lost another large section. I have since moved it to my frag tank and have not had any more losses. Can this be caused by adding new lights? As I have been thinking about it this started immediately after added new lights, 3 250W 14K Usio MH. These provide much more light than the make shift light I had for the last month. They seemed to be melting away to nothing. Now they are happy and fine in the other tank.

[Neogenocide]

Lights will not obliterate zoas that fast. I would look for nudis or sundial snails. If you have a bad enough infestation, they can mow them down fairly fast. You never mentioned what you stock list is.......it could possibly be a fish that is doing this.

Scott

[mkart]

My stock list is as follows, I thought the tang may have been eating them but he is so small.

Sailfin Tang
bi color blenny
cleaner wrasse
50 snails (hermit crabs have ate a few)
40 hermit crabs
4 peppermint shrimp
1 fire shrimp
1 cleaner shrimp
2 emerald crabs
1 flower anenome