My fav zebra crab disappeared for about a month (I know..Fav crab??, but still ) I was cleaning the tank top to bottom one weekend and low and behold, I found the little sucker in my over flow box. He must have climbed onto the grate that covers it, somehow latched onto the tube and hauled himself over the edge and *splash*, Houston, we have a problem..I pulled him out and he was eating like a mad bandit for a couple days. Its good to have him back, but in his case, he simply used the saftey feature to help himself to what I am sure he thought was greener grass ; ) Sometimes, it don't matter what you do, they are a little too smart for their own captive selves ; )
Sorry he died, but try again!
To fail to plan is to plan to fail.