Hello everybody.....Can someone talk to me about course grade aspen as a substrate for Borneo's ? I made a post a day or so ago and nobody seems to have any ideas or suggestions.......my original post is " course grade aspen and digital hygrometers"

Can someone PLEASE let me know what they think about Aspen ( course grade )? ......and if I should buy a seperate digital hygrometer instead of the thermometer / hygrometer combo that I currently have. I AM CONCERNED ABOUT THE ACCURACY ( It's a Taylor , are they good ? ).

Thanks
Yosef