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>cups. The more expensive ones are accurate enough to have the temperature
>actually stenciled on the thermostat. Others (like mine) just have single
>numbers, and must be used with a thermometer - just like the clip-on
> - Anthony
Unfortunately, those 'helpful' numbers on the submersibles still can't be
trusted. I've got an Aquarium Systems Visi-Therm that reads eight degrees
lower (fahrenheit) than the temperature it maintains.