I'm using an HVAC thermostat as a controller. It is a Noma brand digital non-programmable unit with an AC mode. I picked it up for $20 at Canadian Tire. I de-soldered the temperature sensor from the circuit board and reconnected it with a length of wire. I then sealed the sensor inside a glass tube from a used up test kit with silicone. The thermostat uses two AA batteries to operate and switches the fans on and off as needed. I'm using two 12v computer fans powered by a transformer.
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I retired and got a fixed income but it's broke.
Ed
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50 gallon FOWLR, 10 gallon sump.
130 gallon reef, 20 gallon sump, 10 gallon refugium.
10 gallon quarantine.
60 gallon winter tank for pond fish.
300 gallon pond with waterfall.
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