Zoanthid Trouble

[Killgannon]

Hi, my Zoanthids are acting very strange and I'm not sure what to make of it. I've changed nothing and they've been doing great for months and sprouting new polyps. The only thing I can think of is a recent heatwave that hit my area and I was having trouble keeping me temps down. The are outstretched but closed (have have not changed/moved my lighting. Thoughts?

Note: My Leptastrea next to it is also retracted and "shriveled" looking, which it was looking heathier than ever prior. Can this be from the heatwave several days ago?

My parameters are:

Salinity: 1025-1026
Ammonia: 0
Nitrate: 5.0
Nitrite: 0
Calcium: 446
Alk: 8.53
Magnesium: 1380
Phosphate: 0.01

 

[TX_REEF]

What's the temp? Zoas and most corals generally appreciate some nitrates, but if you've always been zero, I doubt that's the issue.

 

[SaltySqueeble]

I would say low phosphates…may be hungry