looks like the plug the tanks were all hooked up to got knocked.
all tanks are in the garage (no insulation yet) and it was a frost last night. I have plugged everything back in to let the tanks slowly warm up again and see if anyone defrosts over the next while.
There is a tiny bit of life in the form of a pearl danio doing lazy upside down circuits, a couple of black widow tetras, some platies and possibly 2 young bettas.
All my stunning veiltail angels (10+), mature male and female BN, breeding pair of whiptails, the discus, Mr Knifey (my BGK), Harry the palembang puffer, 5 of my silver dollar babies, all my kribs and convicts (pink and normal), 2 skunk loaches, an albino rainbow shark... just to name some of the critters i have lost so far. (just seems to be all my favourites dead so far )