Zoa's not doing so well

[DEL 707]

My tank been setup for just under 6 months and I've noticed over the last 2 weeks or so, some of my zoa's don't look so great.

1 of the colonies where my blenny is, has pretty much disappeared.
I'm not sure if it's related, but 1 of my fire shrimp has had a bad molt as well.

I only regulary test for nitrates and phosphates.
Nitrates are 2ppm and phosphates are 0.08ppm.

I dose nitrate and phosphates daily, I try to nitrates between 5-10ppm and phosphate 0.04-0.08ppm.

Are there other elements I should be testing for which could be causing my zoa problem?

As for light, I have an old picture of when I borrowed a par meter from my LFS.

I run the lights at 60%.

Can anyone help? I can provide more details if needed.

 

[PotatoPig]

You PAR may be on the high side. I’ll defer to others with more experience but 200+ PAR is a lot for some Zoas.

 

[DEL 707]

I had my water tested and the only thing that was really low was manganese.
I've been dosing manganese, nitrate, phosphate and also been testing for iodine.

My tank is REALLY nitrate and phosphate hungry, but I've got nitrate up to 10 and phosphate to 0.06.
Iodine has been stable at 0.06.

Things are getting really bad with the zoas though. My big purples are getting covered in green algae.

 

[Tahoe61]

Algae growing on the Zoanthids is obviously not good.
Do you have enough flow in the tank?
You're not testing alk, cal?
What about specific gravity?
What brand of fixture specifically?
What testing methods/kits are you using?

 

[DEL 707]

Do you have enough flow in the tank?

My tank has a fluval 107 filter, which is 500lph. I also have a AI Nero 3. I did have it on a pulse setting at 5000lph, but when I started having trouble with my zoas, Iwas told that was too much and took it down to 3000lph.

You're not testing alk, cal?
What about specific gravity?

I don't test for either. I keep my salinity at 34-35.

Here are my recent ICP test results.

What brand of fixture specifically?
What testing methods/kits are you using?

It's an AI Blade Coral Grow light, think 21".

I use Red Sea test kits.

 

[Llyod276]

Here's a fact you won't like, but it is what it is. Some corals just don't do well, my wife and I bought idk 9 frags of zoas, and 6 of them survived. Of those survivors, only one has jumped off the frag onto the rock, the others are just chilling not shrinking and not growing(no new heads) perse. And this tank is about to hit its 5 month mark.

Also, let's talk about the elephant in the room. Them gsps, man you are brave. But they will over take the tank. Good luck with them...

 

[ColorMeGone]

I had my water tested and the only thing that was really low was manganese.
I've been dosing manganese, nitrate, phosphate and also been testing for iodine.

My tank is REALLY nitrate and phosphate hungry, but I've got nitrate up to 10 and phosphate to 0.06.
Iodine has been stable at 0.06.

Things are getting really bad with the zoas though. My big purples are getting covered in green algae.

If it was me, I would take out the Zoe's with algae on them and dip in a Peroxide solution (16oz of tank water to 3oz. of 3% Peroxide) for a 3-5 minutes to kill it. Also lower the lights down to get the par around 150 on top.