Hey guys looking for advice on my old potbelly. Ran it harder than I ever have tonight. Got stove top temp to 550 which I thought was good. But the cast iron at the bottom was glowing for about 20 min. 1 is this safe for old cast iron or a sign of overfiring? 2 would putting firebrick on the coal grate help any with this? Or should I just keep my fires smaller down in the stovetop temp of 3 to400?
![Advice on old potbelly Advice on old potbelly](https://www.hearth.com/talk/data/attachments/287/287561-8510f2662a61c3b31039d20fcd735ee2.jpg)
![Advice on old potbelly Advice on old potbelly](https://www.hearth.com/talk/data/attachments/287/287560-97d6e5687801301406194607d9c6b80e.jpg)
![Advice on old potbelly Advice on old potbelly](https://www.hearth.com/talk/data/attachments/287/287561-8510f2662a61c3b31039d20fcd735ee2.jpg)