Advertisement So, I've been buying these 10 gallon aquariums from walmart. They don't come with any type of lid, which is fine because I'd probably end up modifying it or replacing it anyways. The price is 15$, so it's a pretty decent deal. I've got one for my hissers, and one for my S. heros so far. My next project will be converting one into a fossorial/arboreal enclosure. I think I have a tendency to go overboard on ventilation. Most of my enclosures have heavy ventilation on three walls of the enclosure, with the front left intact for viewing. This next enclosure will be the inverse of that, no ventilation on three sides or top, and heavy ventilation on one side. This is what the acrylic side will look like. I'll leave a four inch lip on the top connected to a hinged door with a latch. Ideally I would be able to use it as depicted for a fossorial, or flip it upside down and use it for an arboreal. I will be initially using the enclosure for my H. schmidti, but, as that spider is a male I know he won't be occupying that enclosure for a terribly long time. My question, is this ventilation adequate for Avicularia sp.? I know cross ventilation is ideal for them. If not, what arboreal sp. would it be adequate for?