Id please bad or good

[wwdocp]

Hi my brother has these in his tank and i was going to get some corals off him but i don't know now after i saw these thing can anyone tell me if they are good or bad and if bad how to get rid of them

[Invader]

They look like pods and generally become a source of food.

[wwdocp]

Just tring to make sure it's not anything bad let me know

[Loverotties]

Yes they are good!

[Jadinop]

I might be crazy but it looks like some kind of flatworm to me.

[aquawolf]

Welcome to TRT!!!

I also believe it is a flatworm. Since it looks like a white, or clear, one it should be okay. You do not want the red, or rust, colored ones.

You can check out this link for flatworms and more info.

http://www.xtalworld.com/Aquarium/hitchfaq.htm