Out from under a rock popped Mel and said

Hi Rob,
It's definitely not just case of her being lazy. I've had her for 4
years and she is usually a very active fish so this is very out of
character for her.As for your Demekin, she is probably responding to
the water temperature. 14C is quite a low temperature for her to be
at. Fish should be kept at a fairly steady temperature to avoid upset.
Have you ever considered getting a heater to regulate the temp?
Mel.

I had it off because we had power shortages. I have it back on at the
moment.