I turned on my heater for the first time since the tanks been up. Been on for 2 days but the cold weather is dropping my tank temp to 70. The heater hasn't done sh!t. (300watt). Maybe it's because my sump is in the garage and not insulated and I have 40' of exposed plumbing under my house. It's hoovering at 70 and goes up to 74-75 when the light goes on. I read a post saying lethal temp is 62. But anything below 70 sounds scary to me.