How to heat a custom tank

I have a display cabinet about 6 foot by 4 foot that I use for my snakes, the back is wood and so is sides, front and top are glass. I am wondering how to properly heat the tank because of size I am using a heat pad and light but does not seem warm enough. Please any ideas would help. Thank you

Welcome to the site!

Radiant heat panels mounted to the ceiling of the cage might work. What type/wattage light do you have? is is directly accessible to the snake?

What species of snake are you trying to heat?

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Originally Posted by Slim

What species of snake are you trying to heat?

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They are ball pythons one is about 3 feet and ones about 4 feet.

The light is hanging above the glass top outside the cage.

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Originally Posted by Chrissy5628

The light is hanging above the glass top outside the cage.

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Then what your really heating is the glass, not so much the cage.

To be brutally honest, heating that type and size of enclosure for a Ball Python is going to be tough. An under tank heating element and a light are not going to be optimal, and the lamp is going to kill your humidity if you switch to a screen top, and is not really going to heat the cage if you stick to glass. If you use the suggestion that Aaron gave you about the radiant heat panel, you'll at least stand a fighting chance.

Does this cage have a divider, or are you housing them together? I would advise against housing them in the same enclosure...even a big one like yours.