View Full Version : Id please Lots of pics.

11/12/2007, 11:45 PM
I just started noticing these things. I hope you can see them, they are very very small. Are they safe? Any help would be much appreciated.

11/13/2007, 01:09 AM
In small numbers most types are harmless scavengers. There are times when they can reproduce explosively and can become a pest. Most types dont directly harm coral (though some have been blamed for eating acropora), but if you get enough of them they simply smother the coral.

Best way to control them is to keep detritus from building up in the tank- good water flow, good filtration, no overfeeding. If they do take over there is a product called Flatworm Exit that will get rid of them, but it can result in seriously toxic water if you dont use it carefully.

11/13/2007, 01:28 AM
There are acro eating nudis, but not flatworms... (at least not known).

Even with keeping detritus, filtration, and everything else in check, they can still get out of control. My suggestion would be to add some wrasses to your tank... they can decimate a flatworm population very well. Personally, I think natural predation is the only thing that keeps them in check. My personal favorite: fairy wrassses. A trio of some will do a number on those buggers. I added 4 Temmincki fairy wrasses to my 40B when I had it up. It had a horrible flatworm infestation with thousands of red flatworms as well (technically not flatworms). Anyways... 1 week later... not a flatworm in sight.

11/13/2007, 07:08 AM
Thanks guys, I have a sixline wrass in the display tank. I don't really see them in the DT, but there are tons of them in me sump/frag tank.
What can I do about the ones in there? I don't really want to put fish in my refugium, do I?

11/13/2007, 08:23 AM
If its your fuge, no worries. Your 6line should handle them just fine as they arrive to your DT. If they get out of control then you go from there. I've had them for a few mths now and i added alot of flow and a 6line. Problem solved. I see very few.

11/13/2007, 09:30 AM
I have two refugium/sump/frag tanks all plumed in together. In the second(bottom) tank I have a lot of frags, I don't want them to be effected. Would it be ok to put a six line wrass in the sump/frag tank? If I get a second six line, and put it in the frag tank, after he has cleaned up, can I put 2 six line's in a 55 DT?
Thanks for all the help. Here is an old picture of the sump set up, it looks very different now. But this will give to an idea of what I am talking about.


11/13/2007, 10:06 AM
I think I found it, does this look like it?
Amphiscolops langerhansi , a relatively large (2-4 mm), colorful acoel
Found this info here:

11/13/2007, 12:12 PM
6-lines seem to be hit or miss with flatworms. I suppose it depends on what else they can find in the tank to feed on... for of like peppermint shrimp... you need a group to compete for food. Thats why I think fairy wrasses worked for me, but the 6-lines never did.

11/13/2007, 05:25 PM
I have a lot of copepods and what not in the fuge's. What is the best recommended wrass to put in there? Will it be ok to put it in the display tank with the six line, after he has done his job?

11/14/2007, 07:25 AM

11/14/2007, 08:09 AM
Why are you trying to get rid of a harmless species anyway? These aren't C. retrogemma. They aren't going to become a plague and they aren't going to hurt anything.