XL Pioneer XL Bundle(Black 1309)(20 inches wide) Fortress the ventilation is helpful as

the ventilation is helpful as the colony approaches capacity in their formicarium

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XL Pioneer XL Bundle(Black 1309)(20 inches wide) Fortress the ventilation is helpful asThis is a Black Friday Cyber Monday Formicarium This XL is 4 inches wider (adding 25% more room) than the standard Pioneer XL. (No upgrade fee for this package Normally a $75 Upgrade and 25% off for Black Friday but 100% included as part of this bundle.) ***This formicarium comes with a free Mini Hearth of your choice. Please detail specifically what you would like, including model (Standard size, XL, or Bifurcated), color, and decor in the comments