What are these thing

[zope]

i notice these things are they harmful or not?

 

[vetteguy53081]

Hydroids
They are capable of stinging nearby coral
Simply starve them and they will be gone
They favor brine shrimp. Direct water flow towards them, not at them to prevent food from reaching them and they will get no food . You can also place a dab of gel superglue over the top of them

 

[zope]

Hydroids
They are capable of stinging nearby coral
Simply starve them and they will be gone
They favor brine shrimp. Direct water flow towards them, not at them to prevent food from reaching them and they will get no food . You can also place a dab of gel superglue over the top of them

thanks can they become bigger?

 

[vetteguy53081]

thanks can they become bigger?

Only slightly