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Old 07-23-2012, 01:56 AM   #1
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Killer shrimps and bleeding zoas???

I have a new tank, about 3 months and I just have 3 reef safe fishes, and something is killing my zoas. I believe that are a little shrimps that came with my LR, I tought that was something good, but now I think they are a plague.

Here are some pictures of the shrimps and the zoas.



Attachment 108316



Attachment 108317



Attachment 108319



Attachment 108318
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Old 07-23-2012, 02:28 AM   #2
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Are you sure its a shrimp, cannot see that well on my phone but it looks like an amphipod
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Old 07-23-2012, 02:30 AM   #3
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The zoas look to be covered in cyanobacteria thats whats killing them.
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Old 07-23-2012, 02:35 AM   #4
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What is cyanobacteria? How can I kill it?
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Old 07-23-2012, 02:40 AM   #5
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The red algae like stuff on the zoas is bacteria. Its a bacteria that will suffocate corals by growing on it. You can use a product like Chemiclean to get rid of it or try to blow it off with a turkey baster. When I had it I used chemiclean never had it again.
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Old 07-23-2012, 03:07 AM   #6
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Not a shrimp, amphipod, as Justin thought. generally harmless. Excellent live food.
There does seem to be a little cyano, but it's not covering the zoas. Chemiclean is good as a last resort, but first you need to address the cause of the cyano. Does no good to slap a bandage onto a knife wound if you haven't removed the knife yet.
Chemiclean will also mean no skimmer for at least two days, and it'll be several more before it skims correctly again.
Now, I hate to ask the obvious question, but based only on the picture you posted here... What makes you think the zoas are dying? One pic shows what look like healthy zoas, the last shows what looks like healthy Palys. They don't all have to be open all the time. Unless you're seeing polyps disappear or fall apart, I think they are probably fine.
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Old 07-23-2012, 03:40 AM   #7
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Mac, thanks for the explanation. This zoas are new in my tank I had a little colony, like 15 polyps, that came with my live rock and they just disappear, thats why Im taking a closer look to the new zoas and tonight I found that red thing over them.

I was thinking it was the "shrimps" were the problem because every night I see them hidding in the base of the zoas, but maybe Its something else. About the cyano I dont know where it came from, all my levels seem to be fine:

1.024 / 32
Ammonia: 0
Nitrite: 0
Nitrate: 0
PH: 8
Phosphate: 0
Temp: 26.5

I also have like 3 polyps in the sump, and they are ok, so I think something is killing what i have in my tank.

I only have 3 reef safe fishes, 2 feather dusters and a sebae anemone.

What came with my LR (what I have found up to date)

1 stomatella, 2 brittle stars, 1 limpet, a lot of amphipod, somekind of strings coming out of some holes in my LR (someone told me they are spaguetti worms), a little crab and something that looks like a flat worm.

I have not a right ID for the crab and the flatworm, but here are some pictures



Attachment 108357



Attachment 108358
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Old 07-23-2012, 03:51 AM   #8
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The cyano probably came in on them. Just try to brush it off. The shrimp like things are just pods. As for the first ones that died were they covered in red?
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Old 07-23-2012, 03:55 AM   #9
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Best way to fight Cyano and algae breakouts would be frequent water changes and not over feeding. Your levels will be skewed because the cyanobacteria uses up the excess nutrients, giving a somewhat false reading.

The Cyano should brush off easily and siphon it up as you do your water change.
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Old 07-23-2012, 03:57 AM   #10
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I really dont know, I didnt pay much attention to the first ones, they just disappear in about 5 days, I found a polyp on the sand so I took it out and place it in the refugium and now its ok growing.
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