I had an idea for a homemade humidifier/extra heat source. I've seen similar things used to bump up humidity in hermit crab enclosures and thought I'd give it a try. I used a cereal storage container, a fish tank air pump tubing and stone, and a 50 watt fish tank heater.
I attached the fish tank heater to the inside of the storage container and set it at 86 degrees for my Redfoots enclosure but you could adjust the temperature to whatever suits your torts enclosure. I then hooked up the airline and airstone to the pump and placed the airstone inside the cereal container as well. Then I filled the container with water
The water inside the container will stay at 86 degrees from the heater and my thought is the air bubbles will increase evaporation and raise the humidity inside the enclosure. I think this will only be effective inside a smaller closed chamber enclosure. Each morning I will top of the container with water and I hope this will keep the humidity up without constantly having to add water and mist. 
My humidity in my enclosure usually hangs around 80%. While installing this the lid was open and the humidity dropped to 30%. Within one hour the humidity is now reading 88%. So I think it will be effective. 
This whole setup cost about $25 to put together. I'll update with results after it's been running a few days.
I attached the fish tank heater to the inside of the storage container and set it at 86 degrees for my Redfoots enclosure but you could adjust the temperature to whatever suits your torts enclosure. I then hooked up the airline and airstone to the pump and placed the airstone inside the cereal container as well. Then I filled the container with waterThe water inside the container will stay at 86 degrees from the heater and my thought is the air bubbles will increase evaporation and raise the humidity inside the enclosure. I think this will only be effective inside a smaller closed chamber enclosure. Each morning I will top of the container with water and I hope this will keep the humidity up without constantly having to add water and mist. My humidity in my enclosure usually hangs around 80%. While installing this the lid was open and the humidity dropped to 30%. Within one hour the humidity is now reading 88%. So I think it will be effective. This whole setup cost about $25 to put together. I'll update with results after it's been running a few days.
