Advertisement I woke up at 5:30 am last week to find my A. seemani hanging by one leg from the screen lid on its enclosure, so I needed to make a new lid to make sure that the legs didn't get stuck anymore. Here's what I did: I went to Lowe's and got a sheet of plexi-glass (pretty thick) that was 12" x 24". It was $8.00. Then I measured the recess in the aquarium, and cut the plexi-glass to fit. I then make a grid on the plex-glass using a Vis-a-Vis marker (wet-erase)... http://img.photobucket.com/albums/v471/beccamillott/Aphonopelma seemani/Galileo/Spiders130.jpg Then I drilled holes at every intersection and in the squares... It fit perfectly on the tank... And the screen lid still fits on top (because the plexi-glass lid is in the recess) and I can lock it up... My only problem right now is that the humidty has went from 50% to 70% in the last two hours. For A. seemani, I'm assuming this is okay, I just don't want it to raise too much more or I may need to consider drilling even more holes. Although the T is now beginning to dig a burrow, this will hopefully calm my fears about it walking on the ceiling all night long. Do you think the humidity will be okay?