New Hide = No space

[Oxylepy]

In a glass aquarium like that, without it being blacked out or anthing I would think that the 2 hides would, in fact, be necessary. Some snakes are fine with just the one hide, but really you should offer more than one if your snakes are in open veiw like that, it lets them feel more comfortable.

As for the topic at hand, personally I'd say get her into a larger tank, or swap over to a tub. The floor space on that 20 gallon looks a little small for her and when I was using a tank I think I had a similar sized male in a 65 gallon (which, admittedly was a bit large).

Also, how is your humidity? It looks like your entire lid is open for airflow, which, unless you're in a humidified room, could be a bad thing. And what is the temperature under the hot side hide? The bedding looks fairly thick and the heat might not be getting to her.

Sorry, I can be a nit-picker, but we always like to check around here

As for the hide, yeah you need something bigger than that. Get a measurement of her under the current hide (how she is now, to find out the base dimensions you need for the hide) then buy one from there.

Oh and with all the nitpicking and questioning I just did I should probably point out I do love that you stuck with the "keep it simple, stupid" rule, most people like to cram as much in there as possible, while yours is more designed for the health of the animal.