Zoas all closed or like 1/3 open

[Ehunforfun]

Not at home so I can't post a full tank shot or pics of the problem but virtually every zoa in my tank is either fully closed or maybe 1/3 of the way open.

Other corals SPS, Euph, leathers, GSP, chalice/monti are all happy/open showing growth. I've looked for parasites but the only things I ever see is like a random tiny starfish here and there.

None of my zoas are of the pricey variety so I won't be devastated if they disappear, I'm just hesitant to add others with this issue. Also, previously they were spreading QUICK. A single polyp from a local reefer turned into 6, other small colonies were spreading so fast they were starting to concern me.

Params are:
SG 1.025
Temp 76 at night up to 80 at peak.
I didn't write them down but CALC/ALK/MAG were all within normal levels.
Lighting is 5 ecotech radion g4s, the zoas are all in the bottom 1/3 of the tnak
Phosphates .03
Nitrates less than 5

 

[DSC reef]

Are the random starfish asterina? Some can be zoa munchers, I have a few.

 

[Tyler_Fishman]

Sound like theres a parasite at play here, possibly a nudibranch or a spider, check the colonies at night, if they are attached to your rock work then I would just let nature run its course, I would throw the safety of your more expensive stock over zoas

 

[standam]

Somting maybe is wrong but wath is difficult to say. There is options
Are you change lighting or flow, do they have room to growth , any change on parameters, any poison from unhappy corals or fish touch them or pest or algea growing on them. Maybe ipc test will help.
Post some pics

 

[Ehunforfun]

This is the most open they get and it's in the morning usually...

 

[mtraylor]

What are your tank parms?
Did you add any new Zoa's? Could be zoa pocs or something eating them.

 

[SashimiTurtle]

Pull them out and dip them. Take a pipette and blast them to blow anything off. If they don't open try moving them into more flow or lower lighting.

 

[SashimiTurtle]

Mine open in the morning and close mid day because my tank is too small and I have SPS to keep alive so the PAR is too high for them to be open all day. They are growing tho.

 

[chopsuey84]

Try vitamin c. Do some research on it I was having some problems with my zoas and I started dosing vitamin and they made a complete 180