Who's eating my coral!

[djangom]

My newest fish were bought 6 months ago (wrasse, hippo tang and algae blenny) and they all seemed fine until about 3 weeks ago (otherwise all the other fish are 2-3 years in the tank). I bought a bunch of new frags and immediately a torch was eaten in 2 days. Now I notice my Xenia is gone (might be a blessing) but I'm worried about my other softies. I'm thinking the wrasse, but I haven't actually caught anyone in the act. I feed mysis shrimp, blood worms and occasionally some pellets.
66 gallon in the wall reef tank.
fish are:
Melanurus wrasse
Ocellaris clowns (2)
PJ Cardinals (2)
Royal Gramma
Blue Hippo Tang
Diamond watchman Goby
Engineer Goby
Cleaner Shrimp
Emerald crab
Hermits (4)
Anyone have any guesses? Who's guilty!!!!

 

[djangom]

Forgot to add algae blenny to the list?
I also just noticed the "how to post a proper question" thread. I am impressed by that, but it seems overkill for this post? but heres a short version:
66 gallon 42"x 28" x 12" in the wall tank (7 yrs as FOWLR and 3 as a reef)
w WP25 and a hydor 1050 and an ESK-75 HOB simmer
pH 8.3 (API)
Salinity 1.022-3 cheap hydrometer
alk 9.2 (salifert)
Ca 380 (salifert)
Phos 0-0.25 (API)
NO3 0-1 (ELOS)
NH3 0
Temp 79 (thermometer)
I use chemipure and floss filtration in my overflow partition sump (partitioned off of the main tank) w Cheato in there too.
Lighting is a DIY 36 CREE LED (mix of whites/blues and some reds) on from 7 am to 4 pm w a single T5 actinic moon light on from 4pm to 12 pm
6 inch sand bed w live rock
I use a JBJ ato w Kalk in my water
Weekly 5 gallon waterchange (RODI water w Reefcrystals)
Feed mysis/blood worms/+/- pellets daily
Feed Cyclopeze, Coral Frenzy, Phytoplan every other day
What am I forgetting?

 

[Clink51]

Flatworms are a possibility

 

[rookie07]

Not flat worms!

May be the emerald crab.
What type of cleaner shrimp? Peppermints are know to eat coral (sometimes).

 

[rookie07]

Also, are the hermits reef safe hermits? There are some hermits that eat coral.

Lastly, are you sure the corals are healthy?

 

[rookie07]

Could be a hitchhiker from the new coral/frags.

 

[djangom]

Thanks so much for your replies!

The hermits are all from John at reef cleaners and have been there for a long time. The Emerald is from Manhattan Aquarium and has been there for about a year. He's very small (1 inch). The scarlet skunk cleaner shrimp is also a long time resident (2 yrs).
The reason I think it is a fish is because of how quickly and how much is eaten. The Xenia was 3 heads that were eaten in 24 hours completely to the rock.

 

[JonnyJ]

Djangom,

Great post, that tank has some great dimensions. Would definitely love to see a photo!

Everything you listed about that tank sounds good, If I had to choose one fish I would start by watching that Hippo tang. They are notorious for picking! Especially if you recently added corals to an established tank.

Also, it could really just be a strange unexplainable die off.

 

[Uncle Morty]

I would blam the fattest one first !! That seems like a lot of food someone ate

 

[EddieSage]

I had a sail fin tang that ate my torch and I had a new hammer that my peppermint shrimp devoured in 2-3 days. It was sad......

 

[djangom]

So far no more casualties. I'll keep you updated if I figure it out. One other thing, both of those corals were on one side of the tank. I have a few Xenias on the other side which are ok so far.

 

[rookie07]

The same location suggests that it wasn't a fish. I'm thinking hitchhiker.

 

[Kmancevski]

I had to get rid of my hippo tang because of eating my acans, so u might wana watch him.