Spider Tank: A Clear Acrylic Enclosure Built for Spiders

"Spider tank" isn't the word most breeders and long-time keepers use in forums — you'll see "enclosure" far more often there — but it's exactly what a lot of first-time and casual spider owners type into Google, and for good reason: it's a fish tank, but for a spider. This page walks through what actually makes a good spider tank, how our three acrylic sizes compare, and where a repurposed aquarium falls short.

"Spider tank" vs. "enclosure": same thing, different word

If you came here searching "spider tank," you're not doing anything wrong — you're just using plain language instead of hobby jargon. The product you're looking for is the same one experienced keepers call an "enclosure": something built specifically to hold a spider securely, ventilate properly, and let you actually see the animal. A generic aquarium marketed for fish or small reptiles usually misses on at least one of those three points, which is the whole reason spider-specific tanks exist as a category.

What makes a tank actually work for a spider

Spiders are small enough to exploit gaps that would never matter for a fish tank — a snap-lid aquarium hood built for goldfish is not built with an animal that can climb glass and squeeze through a few millimeters in mind. That's why ArachNest tanks use a magnetic-close lid instead of a friction-fit or clip lid: it seals flush without needing to be forced, so you're not leaving a gap out of impatience. Ventilation is built into the panels and lid rather than being something you drill in yourself, and the three sizes we offer are proportioned for jumping spiders and similarly sized invertebrates rather than scaled for fish.

ArachNest spider tank sizes

Every size ships with the same crystal-clear acrylic panels, magnetic lid, and built-in ventilation. The M size in particular is popular for jumping spiders because the extra height (20cm) gives room for the vertical jumps the species is named for, without the footprint becoming so large that prey items are hard for the spider to find.

Why not just use an old fish tank?

We get why it's tempting — you might already have one sitting empty. But a 10-gallon aquarium built for fish has a few structural mismatches for a spider: the hood usually has cutouts for filters and heaters that a spider can walk straight through, there's rarely mesh ventilation built into the design, and the sheer size makes it hard for a small spider to reliably find prey. You can retrofit an aquarium with mesh, silicone, and a custom lid, and some keepers do exactly that — but at that point you're spending time and money building the thing ArachNest already ships assembled.

What verified buyers said

Across 130 verified reviews (4.6/5 average), one buyer specifically flagged the use case that matters most here: "Very good quality, easy to assemble, and the magnetic closure is very good. It will be great for my jumping spider." Another wrote it was "Lovely and great for baby jumping spiders or other small creatures," and a third called it a "nice plexiglas cube for small creatures like young spiders. Easy to install without instructions." We also publish the one critical review we received — jagged edges on a single unit's cut lines — on our reviews page, because a 4.6 average should mean a real spread of experiences, not a curated highlight reel.

Setting up and placing a spider tank

Placement matters more than most first-time owners expect. Direct sun through a window can turn a small acrylic or glass tank into a heat trap within an hour, which is a real risk at this scale — small enclosures heat up faster than large ones. Keepers commonly place tanks on a shelf or desk out of direct light, away from air conditioning or heating vents that create sudden temperature or humidity swings. Because the enclosure is small and light, it's tempting to move it around, but frequent handling and relocation stresses the animal more than leaving it in a stable spot and observing through the clear acrylic walls, which is the whole point of a transparent tank in the first place.

Cleaning routine is the other half of long-term setup. A soft, damp microfiber cloth handles fingerprints and light residue on the acrylic without scratching it — paper towels and household glass cleaners with ammonia are best avoided, since ammonia residue is not something you want in an enclosure housing a live animal. Spot-clean waste and leftover prey regularly rather than doing a full substrate change on a fixed schedule; how often that's needed depends on the species and substrate type, which is again a species-specific husbandry question rather than something a tank alone determines.

A word on care advice

We're not going to dress up basic tank-setup tips as veterinary guidance. Substrate choice, humidity, and feeding frequency depend heavily on the specific spider species you're keeping, and the notes above reflect common practice shared among amateur keepers — not a prescription or a guarantee of animal welfare. If you're keeping a specific tarantula or jumping spider species, cross-reference species-specific care sheets from established keeper communities before finalizing your setup.

Spider tank FAQ

Related pages

Our full lineup is built around the jumping spider enclosure — the core product this "spider tank" language describes. If you're specifically housing a tarantula sling or juvenile, see our tarantula enclosure page for size guidance by life stage. Curious about the acrylic build itself? Read acrylic terrarium. For setup walkthroughs, see our upcoming spider habitat guide and jumping spider terrarium setup guide. Real buyer photos live on our reviews page.