I wanted to do a lucylid mod on my 20 gal long Zoo Med Terrarium. I was able to do it a lot simpler than other mods posted since I already had the sliding mesh lid. After carefully removing the mesh it was simply a matter of cutting the right size of plexiglass, drilling ventilation holes, and adhering it to the back of the lid. Now I don't have to worry about burning out heat bulbs, misting as often, and it looks super cool. I included a halogen strip light on top to keep up ambient air temps during the day and for good visibility. I used aquarium background to black out the back and sides. So far I've got 92 degree hot side, 78 degree cool, about 80 degree ambient temp, and a perfect 60% humidity. I'm pretty happy with the way it turned out. Now I've got to work on making some new hides. Or just ordering some from reptile basics. In one more week my quarantine period will be over and my spider ball will inhabit the side opposite the spider mojave.
Original terrarium - Not mine, just a pic I found for example
Inside top of lid - Wedged the plexi under that lip to hold nice and firm
Inside bottom of lid - I used clear 100% aquarium safe silicone
Finished door in place - drilled 20 holes for ventilation
Installed UTH with probe - Bubble wrap insulation below it to deflect heat up and not effect my dresser. Still has good ventilation below though
Added a strip of plexi inside to keep substrate from falling out
Finished product - With blacked out sides and back
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Question/comments/concerns are welcome. Thanks for looking