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Author Topic: crayyfish developing black spots  (Read 2532 times)
Ravenlock
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Tanks: 75g 3 ryukins, 46g 2 angels and 10 tetras, 30g 1 angel, 5g beta and 2 adfs.
Posts: 45



« on: November 08, 2013, 09:43:09 AM »

Hey there. Tank stats: 29g, ammonia 0, nitrite 0, nitrate 10 ish
Occupants: 1 crayfish, 6 platies

The crayfish that I had for 5 yrs recently died after getting stuck in a moult. I purchased a new cray about 3 weeks ago. It is active and eating with gusto!

However I noticed it is developing black spots on it's claws. It had 3 now it has 5. They are small, but growing.

I've done some research and some sites seem to think i'ts bacteria that has gotten into fighting wounds. It was in a tank with 15 other crays at the store, but it was king of the tank. They recommend salt dipping the cray for 10 mins every 3 days until it moults or the black is bleached out.

What do you guys think? I've never dipped a cray and I am afraid of doing it wrong and killing him. Thanks so much!
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Ravenlock
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Tanks: 75g 3 ryukins, 46g 2 angels and 10 tetras, 30g 1 angel, 5g beta and 2 adfs.
Posts: 45



« Reply #1 on: November 08, 2013, 09:44:31 AM »

Oh and I am doing daily water changes at the moment. Normally 50% a week. Thanks again.
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Muffuletta
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Gender: Male
Tanks: See tank list.
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« Reply #2 on: November 08, 2013, 10:15:11 AM »

I would have to see the black spots.  I have turned crawfish totally black because of the food I gave them.  This was not my intention but it just sort of happened.

In my area there are only two reasons we give a crawfish a salt water dip.  One is to put the crawfish into salt water to purge their systems and to get them ready for the second.  The second well we will just say that does not goes as well for the crawfish. 
While the crawfish won't like the salt dip, I don't think a short time in lightly salt water will do it any harm.
I would make sure it is actually something growing on the crawfish and not just a colouration change.  Diet has a major impact on a crawfish's colour.  A researcher here has figured out a way to change a normal red crawfish into the nice blue crawfish just my changing the diet. 

Also depending on the type of crawfish platies sometimes become crawfish food. 
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Ravenlock
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Tanks: 75g 3 ryukins, 46g 2 angels and 10 tetras, 30g 1 angel, 5g beta and 2 adfs.
Posts: 45



« Reply #3 on: November 08, 2013, 10:35:39 AM »

I'm feeding him bottom feeder wafers, brine shrimp, romaine lettuce etc. Basically the same as the fish. I am aware he may catch some(the other could only catch babies and was great population control lol) if he does, I will move them. I have a spare tank ready.

The spots are too small to photograph, but one appears to almost be a dent? It's hard to describe.
Okay, well I guess I'll keep an eye on him. Maybe I'll ask what they were feeding at the store and hold off on the salt dip for now. Thanks so much.
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