what % of screen top should be left open

[svejuca]

Hi

I have a 40 G Tank and just covered the screen top with foil and tape. I already cut on window open for her to breath and lamp. Now I am about to cut out the second one.
Before I do, I would like to know how big I have to cut it. The one I cut was
6"x6". Wast you think what % of the screen does she need to be open to breath???

Thanks

[RichsBallPythons]

If your not using heat lamp you can cover the entire lid. Screen tops arent air tight so with it fully covered youll get proper levels of RH.

[svejuca]

what are RH levels?

[RichsBallPythons]

RH= Relative Humidity

[svejuca]

The RH level is excellent! Thanks
She survived the night as well I guess that mean she got enough air through the top. No I just have to get the temp out. unfortunately we have an other off school day and Pet go is closed today again.