Airstone 
Hey @Alexander_Smith,
Hard to hear anything with a photo, lol! Hit up the team over at support@grobo.io and we can assist in troubleshooting your sound issue.
Cheers,
Stephen
Is it coming from the back bottom? That is the air pump and maybe it came loose. Mine came loose and was vibrating around, I could hear it far away.
I’ve had that happen a few times it turned out it was my reservoir tray slightly moved I adjusted tray slightly and seems it may have been up against a motor or something! Not quite sure what’s underneath hope you get it quiet
However you figured that problem out mannnnnnnnnnnn ypu just saved my life because that dang box has been driving me crazy. I really appreciate that and it wasn’t anything major so that was a blessing. Thank u again
The way the box is setup it vibrates on the back of the frame and makes the rattling noise that i put some cardboard behind it and the noise died down
Awesome troubleshooting @Alexander_Smith!
Good luck with this run, those roots look nice and white. Let us know if you have any questions along the way!
Cheers,
Stephen