Hmmm, you lot have got me thinking again!!

I'm thinking of giving this wee
aquarium heater a shot, as it's less than a tenner, and fully submersible.

It looks as though the lowest the thermostat will go is 17 degC, which is admittedly a bit higher than we would need, but then again, with only a 25W output, I can't see the water getting all that hot anyway.
Any thoughts folks? Has anyone else tried this sort of thing, or am I to be the nominated TAS guinea pig?
