Algae growing on Zoa only?

chaostactics

Well-Known Member
View Badges
Joined
Jul 5, 2010
Messages
971
Reaction score
518
Review score
+0 /0 /-0
Location
Maryland
TL:DR Pernicious green algae that seems to primarily reside in/on my zoas are killing them off (I think)

I have fairly minimal algae in my display. However one thing I've noticed on some of my zoa that aren't really opening any more is that there is a layer of green algae directly on the zoa.

It grows up the base of some zoa and then over most of the body of a closed up zoa.

I'm not sure if the algae came first or the zoa started getting "sick" i.e. not opening up any more or the algae took hold and irritated the zoa/paly into not opening any more.

It can be blown off with considerable force using a target feeding device. Id rather not treat the tank with Fluconazole / Reeflux again as my potters angel loves to eat algae and I'm trying to grow chaeto in my algae reactor.

Has anyone experienced this? Any tips on getting rid of it?

My CUC is composed of 4 differt kinds of snails and 3 different types of zoa as well as a couple of urchins. But I'm wondering if CUC won't touch it because it's on/in Zoa/Paly.
 
Zoanthids

vetteguy53081

Well known Member and monster tank lover
View Badges
Joined
Aug 11, 2013
Messages
48,652
Reaction score
110,396
Review score
+0 /0 /-0
Location
Wisconsin - Florida in several months
Likely, the algae is in an area where there is sufficient food and light source to keep it happy. Reduce white light intensity and you can give it a hydrogen peroxide dip which algae hates yet safe for the zoa.
Without any pictures, if it’s bryopsis, you will want to remove each strand and root with a tweezers.
 
OP
C

chaostactics

Well-Known Member
View Badges
Joined
Jul 5, 2010
Messages
971
Reaction score
518
Review score
+0 /0 /-0
Location
Maryland
Picture of the algae.

It's green but certainly not cyano. But also doesn't appear to be green Coraline type as it can be blown off forcefully with a baster. Does not appear to be filamentous either.
 

Attachments

  • Screenshot_20210727-100802_Gallery.jpg
    Screenshot_20210727-100802_Gallery.jpg
    109.4 KB · Views: 26
AS
OP
C

chaostactics

Well-Known Member
View Badges
Joined
Jul 5, 2010
Messages
971
Reaction score
518
Review score
+0 /0 /-0
Location
Maryland
I tried a 50/50 peroxide dip on some that I could get off the rocks and there was a lot of bubbles and some "stuff" came off but there wasn't a noticable difference.

Most of my zoas are directly grown to the aquascaping and can't be pulled out to dip.
 

How long does it take to you to get an inch of acropora growth? (on average)

  • A couple of weeks or less

    Votes: 3 1.4%
  • Up to 1 month

    Votes: 13 6.3%
  • Up to 2 months

    Votes: 19 9.2%
  • Up to 3 months

    Votes: 35 16.9%
  • Up to 6 months

    Votes: 49 23.7%
  • Up to 12 months

    Votes: 14 6.8%
  • 12+ Months

    Votes: 5 2.4%
  • I can't grow acropora

    Votes: 59 28.5%
  • Other (please explain)

    Votes: 10 4.8%
Top