Another ID thread. Am I in trouble???

[mseepman]

Please keep in mind that as these little guys die, they give off a poison that is no good for your tank.

If you choose to get rid of them via a chemical means, like flatworm exit for example, siphon as many out as you can then be ready to siphon them as they die.

If you could find a blue velvet, that would be the best option but I rarely see them in stores so best of luck.

[muck]

If you want to go the Blue Velvet route... give Ken a call at BlueWorld. Im sure he will bring one in for you.

[Myka]

Blue Velvet Nudibranchs are sensitive, and don't acclimate very well, so don't be surprised if it dies before it eats any. the advice to up the flow is great advice, I forgot to mention it.

[Delphinus]

I've never seen a canary wrasse or radiant wrasse that didn't pretty much eradicate a flatworm population, given enough time. Plus, they are wicked pretty fish worthy of keeping in their own right.

There was a time there you couldn't get Flatworm Exit in Canada due to some kind of legal issue with the labeling or something. Not sure if that's resolved. Ask around, your LFS might still be able to get it, but if it it isn't available then look at mail-order from the U.S. Only thing with a chemical treatment is it can spike your tank with the massive die off so manual removal for as much as possible is a must.

That said ... I have had flatworms on a couple occasions, but tried canary wrasses in both cases and they did the trick within a month or two.

The only cautionary with the wrasses is that they are jumpers and it's probably more a question of when than if. If you have an open top tank you'll need to take countermeasures to ensure you don't find some floor jerky some day.

[whatcaneyedo]

They have existed in my systems for several years and for a very brief period they reached a large population like what you've shown but now I barely notice them. I've done everything that has been recommended from flow to fish to chemical treatment and head shield slug. But if you don't QT very well (or at all) you'll just get them again... like I did. So don't do anything too crazy (like flatworm exit) unless you're really going to commit.

Mandarin Dragonets are also known to eat them but like wrasse they are hit and miss. In general any wrasse from the genus Halichoeres will sometimes eat them. The best thing you can do in my opinion is add one of these and increase your flow.

[no_bs]

+1 on the wrasses.

[lorenz0]

flat worm exit worked for me. but my population was alot smaller than what you have. best of luck

[gobytron]

Originally Posted by Myka

Blue Velvet Nudibranchs are sensitive, and don't acclimate very well, so don't be surprised if it dies before it eats any. the advice to up the flow is great advice, I forgot to mention it.

I have had 2 for 4 months now.
One large and the other about 1/2 the largers size
Experiences vary I suppose.

Maybe chalk it up to JL having exceptional livestock.

[BlueWorldAquatic]

I have had success with Myka's suggestions also.

Suck up as much as you can at water change time.

I find theat six line wrasses work quite well, 2 in a 200 gal will keep the flatworms down.

I have Blue Velvet Nudi's coming in Thursday night too. Hopefully

Ken - BWA