Thanks everyone for your nice words. I couldn't just flush Marzina. Greg from Congressional buried her in his garden for me. Her partner wasn't eating for a few days, but he started to eat this morning. I was worried about him too. He looks so lonely. Greg lent me a UV sterilizer to try and kill off the bacteria that may have caused Marzina's death. Hopefully no one else will die, all her children were in the tank with her.