Comline 3161 heater?

[ps2cho]

Are there any heaters that are confirmed to fit in the first chamber?

[rvitko]

The only heaters which will work are the very small preset heaters in the 10-50W range. These tend to be sold with a fixed temp of 77 and are not adjustable.

[ps2cho]

Something like this should work then right?
https://www.amazon.com/dp/B008L286BY/ref=psdc_2975456011_t5_B008AGHI38

Its just a 10gal tank and I live in Arizona, so in the summer my heaters dont even run at all, and winter I keep the house at about 68F, so it would only need to heat <10F.

[rvitko]

I would consider something like this as I am worried the flattened dimensions may make fit more difficult-

https://www.amazon.com/dp/B000OQO69Q/ref=psdc_2975456011_t1_B00Q78MMT6