So I went downstairs to feed Steve, who is in my very cold basement boudoir, and as always I checked the thermometer and it was at 70 F! So I went into full blown panic mode, ran upstairs, gimpy foot aside, grabbed a cup and well he's now floating in the 10g.
Anyway, once I got him floating the panic receded and I got a spare thermometer and checked the temp closer to the top (top right corner pretty close to heater) and it was 78 F, much more usual. However the temp on the other thermometer (bottom left corner) was still 70F, I moved it closer to the top and the temp went up to 75F. I can only assume that the strange temperature zones is because my filter broke yesterday and now the heated water isn't getting to all corners.
I've ordered a new filter on amazon but in the mean time should I keep Steve in the empty side of my 10g or put him back in his tank and just hope he doesn't get too stressed out over the weird temperature spots?