New to this, and my zoas aren't looking good

[DragKnee]

I'm new to saltwater, and very new to corals.

A friend gave me a small colony of zoa's, and a different single zoa. I put them on a rock, and they were opened, and beautiful for well over a week. The only time they'd close is if something like a shrimp or crab disturbed them.

I managed this picture a few days ago:

As you can see, every polyp was open and "loving life".

Then yesterday, I noticed my single zoa (Not pictured), was limp and half open, while the group of zoa's pictured above were half closed and the ones that were open didn't look well. I chalked it up as maybe something disturbed them (I work all day, so I couldn't sit and watch the tank all day, so I didn't really know what was going on)

Today I got home from work, to notice the same thing. The single polyp was completely closed and limp while the group just doesn't look healthy. I took a water test with what I can test, and the results are...

0ppm Ammonia
0ppm Nitrite
10ppm Nitrate
400ppm Calcium
9 dKH

This is in a Nuvo 16. I'm running Filter Floss, Purigen and Chemi-Pure Elite in the back media compartment on both sides. I did a 3 gallon water change today hoping that would help, though the rest of the night they haven't changed.

This is how they currently look:

As you can see, the ones that are "open" aren't looking too good. Some are oval in shape and only partially open, while the majority are closed.

Anyone have any ideas?

 

[TX..r33f]

How is your water? and zoas can somtimes be weird. I have had some thrive in my tank and all of a sudden the just melt away.

 

[DragKnee]

How is your water? and zoas can somtimes be weird. I have had some thrive in my tank and all of a sudden the just melt away.

I smelt the water yesterday, and it did have a rather foul odor to it. My other 2 SW tanks smell like salt water, the Nuvo smelt .. bad. Almost as if something died, but everything that I put in my tank (or anything that came on the rocks that would have such an effect) is all still alive and accounted for.

So I really don't know why it smells, or from what.

Which is part of the reason I did the water change (and because it was due).

The parameters I posted are the only things I test.
Salinity sits right around 1.025 - 1.026
and last time I checked pH, it was 8.

Also, I have a hammer coral, a torch coral, and a very small piece of toadstool and they all seem to be doing well.

I've read that zoa's sometimes just wither away, but 2 different types of zoa's simultaneously makes me feel there is something else.

 

[isabella_b]

If there is a super bad smell it could me a fungus? I can't tell in the picture but is there a white film over any of them?

 

[nommarune]

check your phospate levels. using filter floss will build up all the junk it filters and as it starts to decompose it gives off p04 and can create a bacteria bloom in the water. foul smelling is usually associated with ammonia po4 or bacteria.