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Huge shrimp die off :( :(

yeah I didn't think I would be able to pin point the issue, but always good to vent and get opinions. I would say the water as well but its the same water I used to do a 80% water change on other tanks with shrimp.

I am praying that there will be no further casualties when I get home.
 
Just a small update.

Cherry shrimp are still dying off, I am finding around 5-10 a day now, crystals are still going strong and I am yet to find any more dead, babies and adults are doing fine.

I have a new tank ready for the shrimp and I am going to move the cherries over to that, I can only put this down to a water parameter issue, maybe the water is OK for the crystals but lacking something for the cherries.
 
Maybe the water change triggered a moult and the parameters aren't quite right for the cherries and that's causing an issue - the water change made it really obvious as they did it in bulk?
 
tam said:
Maybe the water change triggered a moult and the parameters aren't quite right for the cherries and that's causing an issue - the water change made it really obvious as they did it in bulk?
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That’s actually a very sensible suggestion, especially if you’re not adding mineral supplements via food. Cherries can be prone to failed moults if deficient in minerals.
 
tam said:
Maybe the water change triggered a moult and the parameters aren't quite right for the cherries and that's causing an issue - the water change made it really obvious as they did it in bulk?
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Garuf said:
That’s actually a very sensible suggestion, especially if you’re not adding mineral supplements via food. Cherries can be prone to failed moults if deficient in minerals.
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That's the only other thing I can think of that would only affect the cherries.

I do add minerals in the form of shrimp ming mineral food and montmorillonite clay
 
Nick potts said:
I do add minerals in the form of shrimp ming mineral food and montmorillonite clay
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Also:

Nick potts said:
RO water remineralized with MgSo4 and CaSo4 to a GH of 6, O KH
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Assuming your calculated remin values are correct, that should be plenty of Ca for moulting - although they do seem to do better in harder water I would have thought it would be unlikely to cause a mass die off.
 
I would’ve thought it would be the other way round crystals dying not cherries, very strange! Sorry I can’t be of any help.
 
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