Need an ID please

[dzovi]

Need an id of this. It is a couple of cm long and seems to be slowly spreading.

Thank you.

 

[Sk8r]

Yellow polyps? Not sure, but that's what it looks like. If so, it tends to spread, but concentrated and confined to an isolated rock it can provide a spot of color.

 

[Sk8r]

Yellow polyps? Not sure, but that's what it looks like. If so, it tends to spread, but concentrated and confined to an isolated rock it can provide a spot of color.

 

[jgsensor]

Looks like some type of hydroids to me. Try doing a online search for hydroids or colonial hydroids. There are many different types of hydroids. If this is one I would kill it now. Hydroids will spread like weeds and they pack a powerful sting.

 

[dzovi]

No, I was hoping it was something that I could keep. What the best way to get rid of these guys?

 

[jgsensor]

If it is still a small section you can cover them with kalk paste or use a stiff brush and scrub them off.

 

[dzovi]

The stiff brush won't spread them?

 

[jgsensor]

You can remove the rock from the tank and scrub it in a bucket of salt water and then rinse the rock before replacine it into the tank. I just recently had to remove about 200lbs of rock that was infested with hydroids. There were a few pieces that only had a small patch of hydroids on them, maybe a inch or two in diameter, I just left those in the tank and used a hard toothbrush to basically grind them into oblivion. They have not spread to other parts of my tank by doing it this way, but I seem to keep missing a small spec, because they keep growing back in the same spot. I am however slowly winning this battle finally.

 

[dzovi]

Thanks for the advice. I'd scrub them off this weekend.

 

[jgsensor]

Good luck