After the weather being in the 80's for the past week, the temps have taken a nose dive. Last night it was 48 and the temps in the day are going to be in the 60's all week. At night they are going to be upper 40's lower 50's.... That is going to throw the girls for a loop and cause breed heating issues.
I have also been trying a 25 watt reptile aquarium heater with less success. I have placed it on the counting board inserted just below the SBB. It only heats anywhere from 5-20 degrees above outside temp. And it closes off the SBB. It is too wild and variable for regulating the temps in the hive.