Hi,

Yeah that does sound odd.

You could put it into a rheostat to adjust it slightly downwards as a short term measure but long term it would be best to work out why one is hotter than the other - I assume they are the same brand/ wattage etc and there is no sunlight hitting one tank through a window? Or possibly stray drafts?

Just to recap the thermostat goes to one mat straight but through a rheostat to the one thats getting hotter and you experiment with it for a couple of days.



dr del