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PMGuernsey View Drop Down
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Joined: January 02 2008
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    Posted: September 17 2008 at 10:30pm
I have a friend who has a 39 gallon tank that everytime she adds hermit crabs to it they all die/or get killed. Whatever the cause is it does not affect snails, all the snails are fine. She has not noticed anything eating them, and suspects a rock crab, but hasn't seen one. Does anyone have any ideas that might help her out?
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Dion Richins View Drop Down
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Points: 11664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dion Richins Quote  Post ReplyReply Direct Link To This Post Posted: September 17 2008 at 10:44pm
Mantis or Rock Crab would be my guess. Both are hard to see and catch. (Or poor supply of crabs)
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Adam Blundell View Drop Down
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I've heard of this with alkalinity problems (often times too high???), so I'm told.
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Mark Peterson View Drop Down
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Points: 21436 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark Peterson Quote  Post ReplyReply Direct Link To This Post Posted: September 18 2008 at 1:15pm
If the shells end up in one pile then it is definitely a Rock Crab, but if not...

Like Adam said, first check Alk and Ca, because each organism responds differently to low or high levels.

Next we would need to know how many she adds, how long they live and does she see any remains?

FYI, rock crabs love snails so if her snail population is okay then it's most likely not a RC.

What fish are in this tank? There's also a possibility.
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