Newbie What is this?

[theodo155]

Two thing on this piece of rock? Any ideas?

 

[snapcrackler]

Feather duster worm, a filter feeder, harmless critter. 8)

 

[ReefLady]

The white thing --- small crowned tubeworm - aka mini "feather duster".

Green bubbly stuff is Valonia - nusiance macro algae.

HTH,

 

[theodo155]

Should I be concerned about the Valonia? I have certain areas with it on the rock

 

[ReefLady]

Sometimes it stays on one spot, and really isn't cause for concern. Other times, it will spread fairly rapidly, and might begin to over-take the rocks. Personally, after having fought a few nasty battles with this stuff, I'd get it out while it's in small areas only.

If you have some kalk powder, make a thick paste with a little hot water, and put some paste on top of the algae. Cover this with an inverted clam shell (oyster, scallop, whatever - even a slice of pvc) to deprive it of light. Leave it like this for about a week. This should kill the valonia.

Don't try to scrape it off the rock - if you burst the 'bubbles', there are spores inside which will be released.

Some people use Emerald crabs to keep it in check, personally, I don't think that's the best option. JMO
HTH,

 

[beachbumin]

Will the kalk powder also work for the red bubbles??? I havent thought about trying that yet and scarlets wont touch them

 

[ReefLady]

Not sure what the red bubbles are -- if you mean cyanobacteria, probably not.