Flatworms? Planaria? Good or bad?

[justinhm]

Hey guys, maybe you can help me with an ID. I recently got some chaeto, and I’ve been increasing the amount of feedings I do to bring my nitrites up (levels are currently undetectable according to my API test kit), so my chaeto doesn’t starve. As a result, I’ve seen more and more of these guys on my glass each day. They don’t seem to be on my corals at all (corals are very happy) or bugging my fish. Just wondering if they are good or bad. I don’t want them to become a problem. They have a clear outline and appear light brown in the center. They do not have any red coloration. Thank you.

 

[T-J]

Look like brown flatworms. I didn't dip and brought some home. Thankfully they've been dying off and being eaten by my Spotted Mandarin.

 

[justinhm]

Thanks for the ID! I looked at a few other threads and agree with you. I am going to tone down a little on the feeding and look into a spotted mandarin if the population doesn't decrease after a few weeks.