Kill or Keep need id

Hard to say on the first pic w/o a better picture. I think the second picture is of hydroids.

 

Mine are tiny as well When I took the picture I was surprised how close they came out in the image. I want to be sure what they are before I Kill them.

 

I was kinda thinking that too because the stems didn't look right.

 

What are Hydroids are they good or bad?

 

I kind of want to leave mine until they get bigger so that I can be sure. I was so proud of my random polyps

One good thing is that mine are on a small jutting piece of my rock so I can easily knock that spot off and move on if need be.

I came into the hobby with the mentality that if it came from a reef it can be in my tank.....barring anemones and nudis (super detrimental items in other words.)

 

Bad in that they can sting other corals. Scroll down to see info on colonial hydroids:

An Ounce of Prevention is Worth a Pound of Cure: A Quarantine Tank for Everything by Steven Pro - Reefkeeping.com