Brown spots on redclaw crayfish

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Fishie boy

AC Members
Nov 5, 2019
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Hi all,

my Australian redclaw crayfish recently moult, and straight after I noticed brown/orange patches on her shell. Originally I thought it was just some odd discolouration, but I’ve noticed the spots getting bigger and they look pitted. There hasn’t been any behaviour changes, although she has been eating a bit more, but I put that down to the recent moult.

I use a mix of RO and tap water to get a pH of 7.6. KH is 6 and GH is 8. Apart from a bit of algae occasionally, the tank is healthy and well established.

Any help with this would be really appreciated.

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