Buying Isopods, Enclosure Setup, and Substrate Mix

Buying Isopods, Enclosure Setup, and Substrate Mix: A UK Beginner's Guide

Quick answer: Use a lidded plastic tub with vents high on opposite sides, so air crosses it rather than sitting in it; a shoebox-sized one holds a starter group. Lay 5 to 8 cm of substrate built on flake soil, white-rotted hardwood and organic topsoil, deeper for Cubaris. Keep one end damp and the other drier, except for tropical species such as the Panda King, which want it humid throughout.

Pet options have moved well beyond the standard dogs and cats. Isopods aren't cuddle partners, but they're fascinating low-maintenance pets that have become firmly established in the UK hobby. This guide covers the practical basics - how to choose your first species, set up an enclosure, and build a good substrate mix.

Why Keep Isopods?

The appeal of isopods as pets:

• Low maintenance - among the most forgiving exotic pets in the hobby
• Inexpensive setup - basic enclosure and substrate components, no special lighting, and no heat mat for hardy species in a heated home
• Space-efficient - fit in small enclosures, suitable for flats and small homes
• Self-sustaining once established - colonies grow themselves with minimal intervention
• Real variety - hundreds of species and morphs available in the UK hobby
• No daily feeding - fine to leave for a few days during short trips
• Visually distinctive - patterns and colours that range from subtle to spectacular

Choosing Your First Species

Start with species that match your experience level. Two solid options for getting started:

Beginner-Friendly: Magic Potion Isopods (Armadillidium vulgare morph)

Magic Potion Isopods are a selectively-bred Armadillidium vulgare morph, milky white with yellow patches and black flecks. Why they suit beginners:

• Low maintenance and forgiving of beginner mistakes
• A heated room keeps them inside their 18-24°C band for most of the year, with no heat mat needed
• Don't need specialised humidity control
• Conglobate (roll into balls) for display interest
• Reliable breeders in good conditions
• Accessible price point

Mediterranean origin means they need a humidity gradient rather than constant high moisture. A standard plastic enclosure with good ventilation works well.

A First Cubaris: Panda King Isopods (Cubaris sp.)

Panda King Isopods are a Cubaris sold as Vietnamese, with striking black-and-white colouration - they need warmer, more humid conditions than the species above, but are fine for a beginner, even as a first isopod:

• Sold as coming from limestone caves in Vietnam; we have found no published collecting site
• Tropical conditions needed (21-27°C, 70-80% humidity)
• Medium-sized adults (10-15mm)
• Reliable breeders once settled - give a new group a few months
• Limestone pieces beneficial in substrate (a slow, steady calcium source)
• Priced above the hardy species

Fine as a first isopod, or as a second species once a beginner colony is settled. For broader species selection see our isopods collection.

Isopod Enclosure Setup

Container Options

Two main routes for UK keepers:

Budget approach (recommended for beginners): Plastic Tupperware-style container or RUB (Really Useful Box). Affordable, easy to modify with mesh-ventilated openings, plenty of size options. A shoebox-sized container suits a starter colony.

Display approach: Acrylic or glass terrariums with good ventilation. More visually attractive but more expensive. Useful once you've got a colony established and want to show it off.

Enclosure Size by Colony

A tub is sized by whether it can hold a moisture gradient, not by how many animals are in it, and depth matters more than footprint. Match the tub to the colony and move up as it grows.

Colony	Tub size	Notes
Starter group	3 litres, or 4 to 10 litres for more room	A starter group will settle and breed in it; we keep our own colonies in tubs of 11 litres or more
Growing colony	6 to 9 litres	Room for a longer gradient and a deeper substrate
Production colony you harvest from	9 litres and up, or several smaller tubs	Splitting a colony across two tubs is better insurance than one big one
Giant Spanish Porcellio	17 litres, as we keep ours	They want more floor and much more airflow than most species

Ventilation: Critical

Isopods cannot thrive without good ventilation. Without it, humidity stagnates and mould develops, and stagnant, humid air kills isopods that need airflow, which we know from keeping them rather than from a study. For plastic containers:

• Cut openings on multiple sides (cross-flow ventilation)
• Cover openings with fine mesh to prevent escape
• Use screw-in air vents for tidier setups
• Larger ventilation needed for Mediterranean species
• Smaller ventilation suits tropical species (but still needed)

Hides and Structure

Isopods need hiding places - essential for moulting and population health:

• Cork bark - the standard hobby choice. Stable, safe, mimics natural environment, provides both hiding and climbing opportunities
• Lotus pods - natural enclosed spaces
• Decaying wood pieces - double as food and habitat
• Multiple hides at different humidity levels - allows isopods to self-regulate

Browse our accessories collection for the components above.

The Substrate Mix

Substrate composition matters for isopod health because the substrate is a primary food source, not just a floor, so it needs to be nutritious rather than inert. A standard UK hobby mix:

• 40-50% flake soil, white-rotted hardwood and organic topsoil - the nutritious, moisture-retaining base
• 20-30% crushed leaf litter - food and microbial habitat
• 10-20% additional flake soil - background nutrition
• 5-10% decaying hardwood - food and substrate variety
• Top with a generous loose leaf litter layer

Substrate depth: 5-8 cm (deeper for burrowing species and Cubaris). A quick note on coco coir: it's widely sold as a base and holds moisture well, but it's largely inert and offers isopods almost nothing to eat, so we don't recommend building your substrate around it. Flake soil and hardwood do the same moisture job while actually feeding the colony. Our full substrate guide covers the recipe in detail.

What to Avoid in Substrate

• Coco coir as the base - holds moisture but is nutritionally empty for animals that eat their substrate
• Peat moss - acidic, wrong for most isopod species (woodlice are usually more abundant on calcareous soils than acid ones)
• Pre-fertilised potting soil - fertiliser salts are harmful
• Cedar or pine wood shavings - resinous compounds are problematic
• Sand-based substrates - for arid reptiles, not isopods
• Garden soil from areas with pesticide history

Moisture and Humidity

How damp the damp end should be depends on the species. These are damp-end figures, with the rest of the tub somewhat drier, except where noted:

• Mediterranean species (Magic Potion and other A. vulgare morphs): 60-70% at the damp end
• Tropical species (Panda King and the other still-air species): high and steady throughout with no drier end needed, 70-80% for Panda King and up to 85% for some others
• Adaptable species (Powder, Dwarf Whites): around 70% at the damp end for Powders, 80-90% for Dwarf Whites

Creating a Moisture Gradient That Actually Works

The standard approach: one end of the enclosure wetter, the other end drier. This lets isopods self-regulate by moving between zones - as long as the two ends stay clearly different. Woodlice respond to humidity differences even in damp air (in a 1941 study, Porcellio scaber favoured the wetter side of a gradient that never fell below 75%), so the drier end does not need to be bone dry, just less damp than the wet one. To hold that difference:

• Mist the wetter end every few days
• Place sphagnum moss patches there for humidity retention
• Let the drier end dry back a little between mistings
• Avoid the entire substrate being soggy

Use a hygrometer to monitor humidity if you're unsure. Regular misting with water from the cold kitchen tap maintains levels (use rainwater, or an aquarium conditioner labelled for chloramine, if springtails share the tub).

Foundation Feeding

Once the enclosure is set up, the feeding routine is simple:

• Leaf litter - always present, replenish as consumed (dietary staple)
• Decaying wood - both food and habitat
• Cuttlebone - always available on the substrate surface (calcium)
• Fresh vegetables - twice a week (courgette, carrot, sweet potato)
• Protein - once or twice a week (fish flakes or dried shrimp)
• Fruit - occasionally (apple slices)

Avoid: cooked meat (attracts pests), citrus (keeper guides often advise against it), green tomatoes and tomato leaves or stems (tomatine), pet food (high fat), calcium powder dusting (reptile methodology).

Adding Springtails

Springtails (Collembola) make excellent companions in isopod setups:

• Graze soft mould and fungal films
• Process material too small for isopods
• Create a more resilient bioactive ecosystem

Add a starter culture when setting up. They establish quickly and self-maintain alongside the isopods.

The Starter Setup Shopping List

For your first isopod enclosure:

• Container - plastic storage box (3 litres, or 4-10 litres for more room)
• Flake soil - nutritious substrate base
• Leaf litter - dietary foundation
• Decaying hardwood pieces - habitat and food
• Organic topsoil - adds structure and soil microbes to the base
• Cork bark pieces - hides
• Cuttlebone - calcium source
• Spray bottle - for misting
• Mesh material - for ventilation openings
• Starter colony - 15-20 isopods of your chosen species
• Springtail culture - bioactive ecosystem support

Browse our accessories collection for the substrate and equipment components. For comprehensive setup guidance see our detailed first isopods guide.

What to Expect After Setup

In the first few weeks, isopods may be shy and rarely visible - normal as they settle into their new environment. Over time:

• Week 1-2: Mostly hiding, exploring at night
• Week 3-6: More visible, beginning to interact with the substrate
• Month 2-3: First mancae (babies) may appear if you have a breeding pair
• Month 4-6: Colony begins to visibly grow
• Month 6-12: Self-sustaining colony established

Different species have different growth rates. Powder species and Dairy Cows breed quickly; Panda King and other Cubaris take longer to establish.

Our Recommendation for First-Time Buyers

The best approach for new keepers:

• Start with one easy species (Magic Potion, Powder Orange, or Dwarf Whites)
• Get the basic setup working before adding anything fancier
• Wait 3-6 months and observe the colony
• Add a second species in a separate enclosure
• Gradually expand as your experience grows

Don't start with premium Cubaris (Rubber Ducky, Crazy Horse) unless you've successfully kept easier species first - the failure rate is much higher when starting with demanding species. The Panda King and the Penguin are the easy end of the genus, fine even as a first isopod. Browse our isopods collection for current stock across all difficulty levels.

Isopods are simple to keep once you understand the basics: a secure enclosure with ventilation, an appropriate nutritious substrate, a humidity gradient matched to species, a foundation diet of leaf litter and decaying wood, and always-available calcium. Get those right and isopods thrive for years with minimal ongoing maintenance.

Frequently Asked Questions

What do I need to set up an isopod enclosure?
A ventilated container, a nutritious substrate (flake soil, hardwood and organic topsoil), leaf litter, decaying wood, cork bark hides, a cuttlebone for calcium, a spray bottle, and a starter colony of 15-20 isopods. A springtail culture alongside them grazes the soft mould on leftovers.

What is the best isopod for beginners?
Hardy, forgiving species like Magic Potion (Armadillidium vulgare), Powder Orange (Porcellionides pruinosus) and Dwarf Whites. They tolerate a cooler room, though the Powder Orange and Dwarf Whites breed better with some additional heat from autumn to spring; they don't need specialist humidity control, and they breed reliably. Save premium Cubaris like the Rubber Ducky and Crazy Horse until you've kept an easy species successfully; the Panda King is fine even as a first isopod.

What substrate should I use for isopods?
A nutritious base of flake soil, white-rotted hardwood and organic topsoil, with crushed leaf litter and rotten wood mixed through and a leaf litter layer on top. Avoid building it around coco coir - it holds moisture but is nutritionally empty for animals that eat their substrate.

How many isopods should I start with?
Around 15-20 individuals of a single species is a sensible starting group. More gives you a better chance of a healthy mix of sexes and a faster-establishing colony. Starting too small risks ending up with mostly one sex and slow growth.

Do isopods need heating or lighting?
Most hardy species need no heat mat or lighting in a heated home, which in England averages about 19°C over the heating season. Cubaris are the exception and want a thermostat-controlled mat on the side of the tub through the colder months at least, to hold around 22-26°C. None of them need UV or basking lamps.