I was fretting when one of my tanks would get up to 82 during a warm spell. My other tank was on a chiller, so temps were always in the 78 - 79 range.
Then just last week (before the real hot spell hit) I combined my tanks into one sump with the chiller. Now both stay down in that 78 - 79 range. In fact, over night had my heater come on a couple times as the temp dipped below 78 (heater set to come at 77.9).
And we keep our house central A/C at 74. So I am a happy camper now.
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