This is what can happen with those pop in vents. 4" spider escaped here..
Wow! A determined escape!This is what can happen with those pop in vents. 4" spider escaped here...View attachment 39545
If you go to www.roundvents.com you will find a wide variety of vents. Many use stronger plastic venting or even are rated as insect proof. These have metallic slits or other designs.
Some tarantulas can easily chew through cheap unbonded screens.