Disaster- Three Axolotl Dead

A terrible sight awaited me when I came home from work today. I walked into the kitchen to find water all over the floor. At first I looked toward the sink, but it wasn't coming from there. Then I looked at Nessie's tank, and saw the awful truth. There was a huge crack down the side of the aquarium, and Nessie was stuck in one corner, in about 4cm of water! He has (or had) part of his aquarium built up with gravel so was in the only part that had enough water to cover him. Nessie is safe now, in a Tupperware container for the night, but most devastating of all, is that three of the baby axolotl were swept away. Their jars were up against the side of the tank, and the leaking water went into three of the jars, overflowing them in turn, and apparently washed them away. Poppy, Peekaboo and Wiggles (my particular favorite), have all been lost. We salvaged the survivors, and cleaned up the water from the fifty litre tank. I can't understand why this one long crack developed along one side of the glass. I am thankful just enough water remained to keep Nessie alive.