I have a Herpstat 2 as well and it's heating one of my enclosures and a rack system. Are both of the outlets for your Herpstat two taken with the one tank? The Herpstat 2 is two individual thermostats in one so whatever two items your plugging into it's two outlets don't need to be exactly the same. This would only be the case if you were trying to run say 4 different things on the Herpstat 2 then everything would need to be exactly the same. But the thermostat only really needs to control the heat element (either heat mat/heat tape/etc.) so you could still plug in two tanks to the Herpstat two. Sorry I'm just confused about how you have everything setup lol.
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Sorry I should have specified my setup a bit in the original post. The probes are hooked up to two different under tank heaters in a 40 breeder . What would be the best way to split the herpstat between two tanks ? Thanks