im really sorry to hear you are having such problems neil, not a nice situation at all... this is just an idea (and maybe a bad one), but maybe buying some of those pocket pack hand heaters and throwing them inside a ziplock bag, then put the whole bag in the tank? possibly this will keep the temp up just a bit, and also cost a pretty penny too.
or, and this is an even worse idea... put a piece of steel in the tank, and put a blowtorch on the side of the rod out of the water for a few hours in the evening to try and heat the water that way....
or a battery powered heater if you can find one...
all are very rash drastic ideas, but it might be the only chance you got.
or, and this is an even worse idea... put a piece of steel in the tank, and put a blowtorch on the side of the rod out of the water for a few hours in the evening to try and heat the water that way....
or a battery powered heater if you can find one...
all are very rash drastic ideas, but it might be the only chance you got.