Water Temperature

[Brisco]

I had an issue with a digital thermometer that was out of calibration by 6 degrees. It was reading 80 but after purchasing another digital and glass thermometer to compare my water temperature was actually at 86. Well I lowered to temperature to 80 and now my larger belly crawler pike is hiding and won't even come out for food. When the water was at 86 he was very active and would even take Krill out of my hand. I am not sure what to do to get him to eat now besides raising the water temperature. So I thought I would find out what someone else thinks I should do. Meanwhile my smaller pike is swimming around like nothing changed so it is only affecting the larger pike.