Hi,
Around 6-8 months ago I bought 5 new dwarf blue hermit crabs to go into my tank, around 4/5 months ago, they started to disappear, I'd occasionally see some come back and forth but in the end I was left with three crabs left, and now I only have 2! They both seem very healthy, and my tank has almost no nitrates in it and I regularly do water changes (and the very occaisonaly feeding, but I NEVER overfeed). I have a 5.4 gallon tank. I might believe this may have been the problem but these crabs apparently have quite a small adult size so I thought they would be okay in here. At the moment I also have a small brittle star, and sometimes I worry that it may have eaten the ones before, despite being a Ophiomastix sp. pink brittle star, which isnt supposed to be that aggressive at all.
Around 6-8 months ago I bought 5 new dwarf blue hermit crabs to go into my tank, around 4/5 months ago, they started to disappear, I'd occasionally see some come back and forth but in the end I was left with three crabs left, and now I only have 2! They both seem very healthy, and my tank has almost no nitrates in it and I regularly do water changes (and the very occaisonaly feeding, but I NEVER overfeed). I have a 5.4 gallon tank. I might believe this may have been the problem but these crabs apparently have quite a small adult size so I thought they would be okay in here. At the moment I also have a small brittle star, and sometimes I worry that it may have eaten the ones before, despite being a Ophiomastix sp. pink brittle star, which isnt supposed to be that aggressive at all.