🐹 How to Set Up a Gerbil Habitat (Deep Bedding Is Key)

The gerbil is a cheerful, endlessly busy tunneler, and that single fact drives everything about its home: deep bedding is key. Unlike many small pets, gerbils are built to dig, so the right setup is less a cage and more a "gerbilarium" — a deep tank where they can burrow into a network of tunnels just as they would in the wild.

The gerbilarium

Start with a large glass tank — think 20 gallons or more for a pair — topped with a secure, well-ventilated mesh lid. This tank-style home is far better than a typical wire cage for two reasons: gerbils love to gnaw and will chew relentlessly at cage bars, and, more importantly, a wire cage simply cannot hold the deep bedding they need to burrow. The tank walls also let you watch their tunnel-building from the side, which is one of the real joys of keeping gerbils. Bigger is always better if you have the space, and taller matters as much as longer — deep bedding needs room above it so a gerbil can still stand up properly.

Bedding & burrowing

Fill the tank with 6 to 10 inches of bedding so tunnels have room to form and hold their shape. A mix of unscented paper or aspen bedding with plain hay or shredded paper works best — the hay and paper act like scaffolding so the tunnels do not collapse. Never use cedar or pine shavings, as their fumes can harm a gerbil's airways. Pop a cardboard tube into the bedding to give them a starting point, and they will take it from there, happily excavating for hours. This deep, structured bedding is the heart of a healthy gerbilarium.

Company

Gerbils are social and should never live alone; keep them in same-sex pairs or small groups. The catch is that introductions matter — gerbils can be territorial, so it is easiest to start with young animals introduced carefully, often using the gradual "split-tank" method so they meet safely through a barrier first. Done right, a bonded pair will groom, sleep, and dig together, and watching their teamwork is half the fun.

Wheel, chews & sand

Gerbils are active by day, so give them plenty to do while you are up to enjoy it. A solid-surface wheel lets them run safely without risk to feet or tails. A shallow sand bath keeps their coat clean and sleek, and it doubles as a fun place to dig and roll. Because their teeth grow continuously, provide plenty of safe wooden chews and cardboard to gnaw — this keeps teeth worn down and healthy while satisfying their instinct to nibble everything in sight.

Feeding

A quality gerbil mix makes an easy, balanced daily staple that suits their desert-adapted appetite. You can offer small amounts of suitable fresh food as an occasional extra, but gerbils naturally eat a fairly dry diet, so keep watery treats to a minimum. Fresh water should always be on hand from a bottle fixed to the tank. Being low-odor, dry-climate animals, gerbils stay remarkably clean and fuss-free.

Quick setup checklist

• Large, deep glass tank for a pair — 20 gallons is the bare minimum, a 40-gallon breeder is better — with a secure mesh lid
• 6 to 10 inches of deep bedding, plus hay or shredded paper to hold tunnels
• Unscented paper or aspen bedding, never cedar or pine
• A cardboard tube to kick-start their first tunnel
• Solid-surface wheel, sand bath, and wooden chews
• A same-sex pair or small group, introduced carefully while young

With a lifespan of around 3 to 4 years and famously low odor, gerbils make a rewarding, tidy pet — browse our low-maintenance pets guide for more easygoing options, or take our free pet quiz to find your ideal companion.

🛒 Recommended supplies

Hand-picked gear for this guide. Affiliate links — we may earn a commission. The $/$$/$$$ badges are a rough budget guide, not live prices.

🧽 Cleaning & maintenance

Spot-clean every day by scooping out soiled bedding, droppings, and leftover fresh food, and rinse the water bottle or bowl. Once a week do a bigger clean: change most or all of the bedding, wipe down the gerbil cage or tank, and scrub the hideouts, dishes, and wheel. Use warm soapy water or a pet-safe small-animal cage cleaner and dry everything before adding fresh bedding — harsh household cleaners and strong scents irritate small lungs. Litter-trained pets make this quick if you scoop the litter box each day.

Cleaning supplies for this habitat. Affiliate links — we may earn a commission. The $/$$/$$$ badges are a rough budget guide, not live prices.

⚠️ Common gerbil setup mistakes

Already have one and something feels off? Start here. These catch almost everybody — none of them mean you have done badly, and every one of them is fixable.

Is my gerbil tank tall enough?

The mistake: Filling a short tank right up with bedding.

Deep bedding is right, but gerbils also need clear air above it to sit up on their back legs and look around. A standard 20 gallon tank is only about 12 inches tall, so 8 inches of bedding leaves them squashed under the lid with nowhere to stand up.

Try this: Aim for about 20 inches of height in total — say 8 to 10 inches of bedding with as much again of open space above. A wire mesh topper clamped onto the tank is the cheap way to buy that headroom; a 40 gallon breeder tank is the roomier way.

Why are my gerbils suddenly fighting?

The mistake: Stripping the whole tank out on cleaning day.

Gerbils recognize each other by smell rather than sight, so taking every scrap of old bedding away at once can leave them smelling like strangers to one another. A pair that lived happily together for a year can then fight, badly, within minutes.

Try this: Clean in sections every couple of weeks and always put a good handful of the old nest back. If a fight does happen, separate them straight away, clean any wounds, and only ever try again through a split-tank barrier — never just drop them back in together.

Do gerbils really need a water bottle?

The mistake: Believing gerbils barely need to drink.

Gerbils are brilliant at saving water and drink less than a teaspoon a day, which is exactly why an empty or jammed bottle can go unnoticed for days. The water still has to be there — they save it with clever kidneys, not by going without.

Try this: Check it every morning: press the metal ball with a fingertip and see a drop come out. Refill with fresh water and wash the spout each time, since a sticky spout is the usual reason a bottle stops flowing.

Is a sunny windowsill a bad place for a gerbil tank?

The mistake: Standing the glass tank in a sunny window.

Glass heats up like a greenhouse, and gerbils buried in deep bedding cannot get away from it. They are comfortable at about 68 to 75°F (20 to 24°C) and overheat quickly above that.

Try this: Move the tank to an inside wall, away from windows, radiators and drafts. It is free, takes two minutes, and is one of the few fixes with no downside at all.

My gerbil only eats the sunflower seeds — is that bad?

The mistake: Topping the food bowl up every day.

Sunflower seeds are the candy of the bowl: high in fat and low in calcium. If the bowl is refilled before it is empty, gerbils simply eat those and leave the rest, which means a chubby gerbil missing out on the nutrition in everything else.

Try this: Wait until nearly all of it is gone before you refill, or scatter the food across the bedding so they have to forage for it. Picking most of the sunflower seeds out and handing them over as occasional treats works well too.

❓ Common questions

📚 Where this comes from

We check our care advice against vets, animal charities, and government health guidance. Here is what this page is built on.

Vets, charities & official guidance

• Creating a good home for gerbils — RSPCA
• Providing a home for a gerbil — Merck Veterinary Manual
• Gerbil cage size and bedding — Blue Cross
• The ideal home for your gerbils — PDSA
• Merkblatt 161: gerbil housing minimums — TVT (Germany)

Checked August 2026. These are other people’s websites, and none of it replaces your own vet — if a pet seems unwell, call one.