One by one, since the 23/1/14, I have had them dieing. It looks like something has poisoned them. I am down to three now, with one not looking too good.
I had fed them their usual meal of earthworms before going to work. When I returned two were dead. One by one they begin to float and curl up and then die, one appeared to go through a spell of convulsions . The live daphnia in their tank where still merrily swimming around.
I had my last order of earthworms for over a month and nothing appears amiss. These are kept in one of two worm buckets and fed vegetable peelings( I buy organic so I am reasonably happy there was nothing nasty on them). I have emptied the aquarium and nothing appeared amiss. The water quality was checked when the first became ill with my test kit, and a sample was tested at the local aquatic centre and that was spot on.
All my other animals that are fed from the same worm bin are good. I am at a loss to know what has caused this.