The same thing happened to my sand sifting starfish when we first got our system. after him being healthy for months, he just lost arm by arm. =(
Is yours a sandsifter?
If so, I hear it's common they just eventually eat up all the fauna and what not in the sand, and starve. Do you have a deep sandbed?
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freshwater 55gallon bowfront
Saltwater 55gallon column seahorse tank
saltwater 65G mixed tank w/ 30G sump
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