Help me figure out why my cuttle died...

reef-maharani

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I've got 4 sepia officianalis cuttles, a 900 gallon system. They were all doing fine yesterday, however one did not eat this morning, this afternoon he bagan holding his tentacles splayed out, then later his feeding tentacles began dangling and he died shortly. They have been here about 3-4 months and doing fine, however out of the blue a couple weeks ago, I had a nitrite spike, but was doing water changes almost every day. The nitrites yesterday were 0.169 and today were down to 0.158. Still not sure where the nitrites are coming from as they get water changes at least once a week regularly. When the nitrites spiked the water changes began every day or other day. They have all been acting normally despite high chems until today.....any ideas?
 

cthulhu77

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Have you checked your silicate levels? Holding the tentacles splayed out sounds like a oxygen transfer issue...how are your water temps?

greg
 

chrono_war01

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what does tentacles splayed out has to do with oxygen transfer?
 

reef-maharani

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hmmm...

I think stressing is always a possibility, however I can't imagine what would have stressed just one and not the other three, especially when nothing has changed in the system in the past month at least other than the nitrites. Temps are sitting around 76 most days, but occasionally fluctuate to 78. I was however misinformed and they are not officianalis, but are pharaonis instead. This led me to question that perhaps they are simply getting older and their coping abilities are on the decline...who knows.....have not checked silicate levels, however the only water going into the system ever has been salted RODI.
 

joel_ang

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If there's not enough oxygen for the cuttle it wouldn't be able to control its muscles hence the tentacle splaying. But I don't thats the problem cause it would affect the other cuttles too.

Pharoanis have pretty short lifespans, around 8 or 9 months I've heard, so if your cuttle is rather large then old age would be a possibility.
 

reef-maharani

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thanks

well, thank you all for the input, I think I've pretty much settled on a combination of old age and the nitrite issue. However, the nitrite issue is still a mystery,it's down to 0.136 after almost three weeks of water changes, no end in sight so far. I think that the bio tower has gotten detritus accumulated in it perhaps creating anozic zones?....ever happen to anyone before? Otherwise I can't figure it out..
 

Jean

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I've heard of that happening, can be pretty icky :yuck: if that is the case you should be able to smell it if you open the case! That dear ol' rotten eggs smell!
J
 

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