Normally I would have said you are ok - but when my Harry escaped it was out a gap in the top of his tank about 1/3 of inch big, he was about 250 grams or slightly more at the time - never under estimate their power to squeeze out those tiny gaps! 1/4 inch holes are ok but gaps allow more area to squeeze out of. I'd say you are 95% ok.
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Tosha

"One of these days i am going to wake up..look around...and realize my place looks more like "Ace Venturas"s than my own." Coldthumb

7.33.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Skywalker)
0.0.1 Green Tree Python
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope John Paul "JP"
2.2.1 Fish (1,2,3,4)
0.0.2 frogs rescued from pool skimmer
0.0.1 lizard rescued from vicious feline

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