So, I open my tank today, and was hit by a smell of decay. Looking closer I finally spotted one of my azureus. (the blue posion dart frog) He was stuck in the outtake of one of my water pump. He was bigger then the pump and I guess he didn't know how to step backwards. He was bloated, and gone.
Somehow, I feel really bad, and felt like it was my responsibility. Well, I'm going to cover the opening up for now, I'll talk later.