Hi there 1 week ago- i decided to get three ghost shrimp for my 50 litre tank- there are no fish- only plants. Well yesterday I checked and the 1.5 inch one (the biggest one) has disappeared, I cant find him anywhere - not on the ground (although the tank is covered) or anywhere. The other two (itty and twitty) are both tiny, so they couldnt eat him- but he has just gone! Has anything like this ever happened to anybody here- I feel terrible. I really like him.