Keeping Discoid Cockroaches as Pets: Setup, Handling & Daily Care
- Role
- Staple feeder
- Protein
- ~20%
- Fat
- ~6.5%
- Moisture
- ~60%
- Chitin
- low
- Ca:P
- 1:3
- Calcium-rich
- No (dust it)
- Best for
- Most insectivores — beardies, geckos, frogs, monitors
I'll make the case plainly: discoid cockroaches (Blaberus discoidalis) are one of the easiest, most forgiving pets you can keep, and a great first invertebrate. They can't climb smooth walls, so they can't escape a basic bin. They don't bite or sting. They're nearly odorless and silent. And the daily care load is close to nothing. This is the practical, routine-focused version of how I keep them — less biology lecture, more "here's exactly what to do."
Why they're such easy pets
A quick honest summary of what makes discoids beginner-proof:
- Foolproof containment. Adults can't grip smooth glass or plastic, so a plain bin holds them. (Ignore old advice about roaches being "escape artists" — that's not discoids on smooth surfaces.)
- Calm and harmless. No biting, stinging, hissing, or aggression.
- Clean. Nearly odorless when kept right; far cleaner than crickets.
- Forgiving. They tolerate a reasonable range of temperature and humidity, so small mistakes aren't fatal.
- Self-sustaining. Keep a few and you'll likely end up with a colony, since they're live-bearers that breed readily.
They're a Central/South American tropical species — not a household pest roach — so the usual roach baggage doesn't apply. (For species and invasive-roach background, the University of Florida's entomology and nematology department is a good non-commercial resource.)
Quick-start setup
Everything you need, once:
- Enclosure: a smooth-walled plastic bin or glass tank with a secure lid. A few roaches do fine in a small bin or 5-10 gallon equivalent.
- Ventilation: cut vents and cover them with fine metal mesh (hot-glued). Adults stay in regardless, but newborn nymphs are pinhead-sized and slip through coarse holes — fine mesh is the fix.
- Hides: vertical cardboard egg flats. Cheap, perfect, and they add lots of surface area.
- Heat: a side-mounted heat mat on a thermostat. Set the warm zone to ~80-85°F (mid-80s to ~90°F if you want breeding). Never bottom heat — it cooks the floor where they cluster.
- Humidity: a water-crystal dish for steady moisture plus safe drinking water. Target 60-70%; a cheap hygrometer confirms it.
- Food dish: a shallow dish for the dry base.
Set this up and let it stabilize before the roaches arrive, so they walk into finished conditions.
The daily and weekly routine
This is the whole job, and it's tiny:
Daily (30 seconds):
- Glance that the water crystals are still moist.
- Pull any fresh produce that's spoiling.
Weekly (a few minutes):
- Top up the dry food base and refresh water crystals.
- Add a small amount of rotated produce.
- Eyeball temperature and humidity readings.
- Remove obviously soiled food or any dead roaches.
Twice a year:
- Do a deeper clean: move the roaches to a holding container, replace egg flats and any substrate, wipe out the bin, dry it fully, and reset. Don't over-clean — a little accumulated frass is normal and the nymphs actually feed in it.
Feeding, simply
Discoids are scavenging omnivores. The simple, reliable plan:
- Always available: a dry base — roach chow or whole grains — for steady protein.
- Rotated treats: carrot, squash, leafy greens, apple, sweet potato. Small amounts, removed before they rot.
- Hydration: water crystals or a damp sponge. No open water dishes — nymphs drown.
Skip salty, oily, or processed food and anything that might carry pesticide. If you ever feed these roaches off to a reptile, dust them with calcium first — like nearly all feeders, discoids are phosphorus-heavy, not a calcium source, regardless of claims to the contrary.
Handling
Discoids are genuinely handleable:
- Move slowly; let the roach climb onto a palm-up hand rather than grabbing it.
- Keep sessions short, low to a soft surface.
- They'll often explore your hand with their antennae when relaxed.
You don't need to handle them for their health — it's purely for your enjoyment — but it's a nice perk of a calm species.
Quick health checks
A healthy discoid is glossy, intact, and moves purposefully when disturbed. Watch for:
- Lethargy or roaches on their backs: often a temperature or hydration problem — confirm warmth and moisture.
- Shriveled/dry appearance: dehydration — raise humidity, offer water crystals.
- A pale, soft roach: it just molted — leave it completely alone until the shell hardens.
- Sour or ammonia smell: the bin is too wet or has rotting food/waste buildup — dry it out and clean.
- Tiny tan specks on damp food: grain mites, a too-wet signal — dry the bin and improve airflow.
When something goes wrong
- Roaches dying off: almost always too cold, too dry, or bottom heat. Reset to a side mat at 80-85°F and bump humidity.
- Smell: too wet, overcrowded, or old food. Dry, thin, and clean.
- "Escapees": check the lid seal and that vents are fine-mesh; adults can't climb smooth walls, so it's nearly always a gap or a nymph route.
- Overcrowding: thin the colony (feed some off or rehome) before stress and cannibalism set in.
Your first week, step by step
The first week is really the only time discoid keeping takes any thought:
- Days 1-2: Let new arrivals settle into the prepared bin. They'll likely be quiet and hide — normal. Offer water crystals and a little produce; don't handle yet.
- Days 3-4: Confirm your readings. Stick a thermometer in the warm zone and read it — "it's colder than you think" is the most common new-keeper surprise. Adjust the thermostat to hold ~80-85°F.
- Days 5-7: Check humidity (60-70%) and watch behavior. Active roaches exploring at night, eating, and clustering near the warm end mean you're dialed in. Now you can start gentle, brief handling if you want.
After that, it drops into the tiny daily/weekly routine above.
Letting a colony grow (optional)
Even if you only wanted a few pets, discoids tend to multiply, and that's a feature. Females give live birth, so you'll start seeing tiny nymphs with no effort on your part. If you want the colony to grow:
- Keep the warm zone toward the mid-80s to ~90°F — heat is the single biggest lever on reproduction.
- Keep a steady protein base available; breeding females need it.
- Don't over-harvest the founders before the first home-grown generation matures (about 3-5 months).
If you don't want more, simply run cooler, keep the group small, and rehome or feed off the surplus.
Is it really this easy? (Honest expectations)
A few realistic notes so nothing surprises you:
- They're nocturnal, so during the day they mostly hide. If you want to see activity, look in the evening or use a dim red light.
- They're not cuddly. Discoids tolerate handling and explore your hand, but they're not interactive like a mammal. The appeal is calm observation, not affection.
- Heat is the one thing you can't skimp on. A cold colony goes sluggish and stops breeding. Everything else is forgiving; temperature isn't.
- A faint earthy smell on opening the bin is normal; a sour or ammonia smell is not and means too wet or dirty.
If you'd rather start with strong, well-started stock instead of gambling on random roaches, All Angles Creatures stocks healthy discoid roaches in a range of sizes.
What you actually need to buy
The whole shopping list is short and cheap:
- A smooth-walled plastic bin with a lid (or a small glass tank)
- A roll of fine metal mesh and a hot-glue gun for the vents
- A few cardboard egg flats
- A heat mat sized to one side wall, plus a thermostat with a probe
- A hygrometer (and a thermometer if your thermostat doesn't display temp)
- Water-retaining crystals and a shallow dish
- A bag of roach chow or whole grains, plus whatever produce you already have
That's it. Total outlay is modest, and the only recurring costs are food and the occasional fresh egg flat. The thermostat is the one place not to cut corners — an unregulated heat mat can overheat and cook a colony, while a regulated one just quietly holds the right temperature for years.
The bottom line
Discoid cockroaches reward you with one of the best effort-to-payoff ratios in the hobby: set up a warm, humid, mesh-vented bin with egg-flat hides once, then spend about 30 seconds a day and a few minutes a week, and you've got calm, clean, fascinating pets that essentially run themselves — and quietly breed into a colony if you let them.
Want the deep-dive on dialing in heat, humidity, and a thriving breeding colony? See my complete playbook for keeping and breeding discoid roaches, or browse the full feeder insect care library.