What are these?

[mhaught]

Little circular white bug things I can see on my class, not sure what it is.

 

[mhaught]

There is the bigger round one with like starfish arms and the smaller guy below it. Unsure what they are

 

[Cthulukelele]

They are hydroids. They're the kind that typically clear up on their own as a tank matures not the plague ones, but you can scrape them off with a credit card if they bother you. There's also quite a few copepods crawling around which are good guys! That's the lower thing

 

[mhaught]

They are hydroids. They're the kind that typically clear up on their own as a tank matures not the plague ones, but you can scrape them off with a credit card if they bother you. There's also quite a few copepods crawling around which are good guys! That's the lower thing

Thanks very much