On Thu, 9 Feb 2006 13:18:52 -0500, "Peter Pan"
wrote:

I have a well established tank of 4 years. Over the time I've had my set up
I've noticed that when I introduce several fish at one time, they slowly
disappear, one by one. I mean they LITERALLY DISAPPEAR. I never find a
carcass, in or out of the tank, they simply vanish. I asked a co-worker who
also has a reef set up, if he ever has fish that simply vanish, he's has the
same problem. I am convinced that my tank has a Black Hole Vortex that my
fish swim into, never to return. The vortex probably leads back to the ocean
to free them from captivity.

Hello Peter,

Hermit crabs, brittlestars etc. will get rid of carcases quite
quickly, but maybe you have have something in the tank that catches
swimming / sleeping fish for its dinner.

Regards, Fishnut.