Buying your first isopods is one of those small, exciting hobby moments — but it's also a decision that genuinely matters. Pick the wrong species, an unhealthy starter group, or an unsuitable supplier, and your introduction to the hobby becomes a frustrating crash course in colony failures. Pick well, and you've got a thriving, breeding colony within months that can be the foundation of years of keeping.
This guide walks through everything UK keepers need to know before that first purchase: choosing a species that suits your setup, what makes a good supplier, what to expect when your isopods arrive, and how to give them the best possible start. It's written for genuine beginners, but experienced keepers expanding into new species will find the buying considerations equally relevant.
Quick Answer: What Should I Buy First?
For most UK beginners, the best starter isopods are selectively bred Porcellionides pruinosus ("Powder" morphs in orange, blue, or rainbow), Porcellio laevis ("Dairy Cow" or other morphs), Trichorhina tomentosa ("Dwarf Whites"), or selectively bred Armadillidium vulgare lines (such as Magic Potion, Jelly Bean, or Zebra). These species are hardy, prolific, forgiving of beginner mistakes, and tolerate UK room temperature without specialist heating. Premium tropical species like Cubaris ("Rubber Ducky," "Panda King") and Ardentiella (formerly Merulanella) morphs are best left until you've gained experience — they're more demanding and expensive, and beginner mistakes are costly. Always buy captive-bred from a reputable UK breeder like PostPods.
What Are Isopods?
Before discussing what to buy, a quick orientation. Isopods (commonly called woodlice, pill bugs, or roly-polies) are terrestrial crustaceans — relatives of crabs and lobsters that made the move onto land hundreds of millions of years ago. They breathe through specialised structures on the underside of the abdomen called pleopodal lungs, which need moisture to function — which is why all isopod care revolves around managing humidity correctly.
The hobby covers several major genera, each with distinctive characteristics:
- Porcellio — fast-moving, can't roll into a ball, ranges from common UK species to large Spanish "giants"
- Porcellionides — small, prolific, fast-breeding "Powder" morphs
- Armadillidium — true pill bugs, hardy, forgiving, available in many colour morphs
- Cubaris — tropical Asian species, premium-priced, demanding husbandry
- Ardentiella (formerly Merulanella) — Vietnamese tropical species, vivid colours, advanced care
- Trichorhina — tiny "Dwarf Whites," used as feeders and bioactive cleanup crew
For a deeper introduction to each genus, see our complete beginner's guide to keeping isopods in the UK and our types of isopods overview.
How to Choose Your First Species
The biggest first-purchase mistake is buying based purely on visual appeal. The colourful Cubaris and Ardentiella varieties are stunning, but they're also among the most demanding species to keep — and a lost £80 starter colony is a discouraging way to enter the hobby.
A more sensible approach: match your first species to your commitment level, budget, and setup constraints.
Beginner-Friendly Species (Recommended for First Purchase)
These species are hardy, forgiving, and tolerant of UK room temperatures without specialist equipment. All available from PostPods:
Powder Orange Isopods (Porcellionides pruinosus) — bright orange, fast-breeding, visually appealing, and one of the easiest species in the hobby. Tolerates a wide range of conditions and forgives beginner mistakes generously. Excellent for bioactive setups and great as a confidence-building first purchase.
Powder Blue and Rainbow Mix Powders — same species as Powder Orange, different colour morphs. Equally hardy and prolific.
Dairy Cow Isopods (Porcellio laevis) — large, distinctive black-and-white patterning, prolific breeders. The best beginner choice if you want a substantial display species.
Dwarf White Isopods (Trichorhina tomentosa) — tiny but hugely prolific. Excellent for small enclosures or as bioactive microfauna.
Zebra Isopods (Armadillidium maculatum) — classic black-and-white striping, hardy, easy to keep at room temperature. The natural step-up from grey wild-types.
Jelly Bean Isopods (Armadillidium vulgare "St. Lucia") — selectively bred colour morph with extraordinary individual variation (oranges, reds, golds, greys). Slow growers but stunning. See our Jelly Bean care guide.
Magic Potion Isopods (Armadillidium vulgare) — multi-toned selectively bred vulgare line, beautiful and hardy.
Intermediate Species (Save for Second or Third Purchase)
Once you've successfully kept a beginner species for 6–12 months, you've built the husbandry skills for these:
Spanish Porcellio species — P. expansus (Giant Spanish), P. hoffmannseggii, P. bolivari. Large, impressive, but require specific ventilation and dry/moist gradients. See our Porcellio expansus care guide.
Easier Cubaris — C. murina lines (Little Sea, Papaya), Cappuccino, Latte, Panda King. Tropical care requirements but more forgiving than premium morphs.
Advanced Species (Wait Until You're Confident)
These are the expensive, demanding species that pull people into the hobby — but they're the wrong place to start:
Premium Cubaris morphs — Rubber Ducky, Lemon Blue, Cherry Blossom, Honey Tiger Ardentiella morphs (formerly Merulanella) — Red Diablo, Ember Bee, Phoenix, Scarlet, Pink Lambo Rare Spanish Porcellio — P. expansus "La Senia"
For a fuller breakdown of which species suit which keepers, see our guide to choosing the right isopod species.
What to Look for in a Supplier
Where you buy from matters as much as what you buy. The hobby has its share of low-quality sources — sellers who flip wild-caught imports, hobbyists who don't quarantine properly, and suppliers who can't or won't describe their breeding setup.
What to look for:
Captive-bred (CB) stock. Wild-caught (WC) imports — particularly tropical species — typically suffer 50–80% mortality within the first few months of captivity. Captive-bred animals are acclimated, parasite-screened, and dramatically more likely to establish thriving colonies.
UK-based breeding. UK-bred animals haven't been through the stresses of international shipping, customs delays, or extended transport. They arrive healthier and adapt faster.
Live arrival guarantee. Reputable suppliers stand behind their stock with a clear policy if anything arrives dead.
Detailed care notes. A serious supplier knows their species and provides species-specific care information with each order — not generic advice copy-pasted across listings.
Transparent breeding setups. A reputable seller will happily describe their husbandry: substrate, temperature, humidity, breeding stock origin. If a seller can't or won't, that's a red flag.
Responsive customer service. Questions before purchase, problems after — both should be handled promptly and helpfully.
PostPods meets all of these criteria: every animal we sell is captive-bred (in-house or via vetted UK breeders), comes with a live arrival guarantee, ships with detailed species-specific care notes, and we're available to answer questions before and after purchase. Our breeding setup is open and well-documented across our care articles.
How Much Should You Spend?
Budget is one of the most useful filters for a first purchase. As a guide:
| Budget | What You Can Get from PostPods | Best Use |
|---|---|---|
| £10–20 | Starter colony of Powder Oranges, Dwarf Whites, or wild-type P. scaber | Confidence-building first colony, bioactive cleanup crew |
| £20–35 | Selectively bred vulgare morphs (Magic Potion, Jelly Bean), Zebra Isopods, Dairy Cow | Good visual appeal, easy care, breeding rewarding |
| £35–60 | Easier Cubaris (Cappuccino, Panda King), Spanish Porcellio starter species | Step up in difficulty, premium look |
| £60–100+ | Premium Cubaris, Ardentiella morphs, large Spanish Porcellio | Advanced keepers, dedicated display setups |
Don't start at the top. Spending £80 on premium Cubaris as your first purchase is a poor introduction to the hobby — the husbandry stakes are high, the breeding is slow, and recovery from beginner mistakes is expensive. Start at £10–35 with hardier species, build the husbandry skills, then progress.
For keepers who want to try several species at once, our isopod mystery boxes are a popular alternative — curated selections of healthy stock from multiple species, hand-picked for variety and value.
How Many Isopods Should You Start With?
This is one of the most-overlooked questions and a common cause of failed colonies.
Minimum starter group sizes by species:
- Fast-breeding species (Powders, Dwarf Whites): 10–15 animals is plenty
- Standard species (most Armadillidium, P. scaber, P. laevis): 10–20 animals
- Slower species (Cubaris, Ardentiella, large Spanish Porcellio): 10–15 animals minimum, ideally 15–20
Why these numbers matter:
- Smaller starter groups (3–5 animals) often fail to establish — too low a chance both sexes are present, too vulnerable to losses
- Founding populations under 10 risk inbreeding depression within a few generations
- More animals at the start = more breeding probability and faster colony establishment
PostPods sells starter groups sized appropriately for each species — for hardier species, a small "5-pack" listing usually represents an adequate starting point because of the high probability of mixed sexes; for slower species, recommended group sizes are larger.
What to Expect When Your Isopods Arrive
A healthy delivery from PostPods looks like this:
Outer packaging: Insulated box with appropriate temperature management (heat or cool packs depending on weather conditions). Royal Mail next-day-by-1pm service.
Inner packaging: Sealed container with sphagnum moss for moisture, leaf litter for hiding, and small amounts of food. The container is sized appropriately for the species — too small to allow movement during transit, but with enough space for breathing.
The animals themselves: Some will be visible, some will be hiding under moss or in leaf litter — both are normal. Don't panic if your isopods seem inactive on arrival; many species reduce activity when stressed by transport, and they'll be fine within a few hours of being in their new enclosure.
Care notes: Species-specific instructions for setup, temperature, humidity, and feeding.
Live arrival guarantee: If anything has gone wrong — DOAs, low counts, packaging failure — contact PostPods immediately with photos. We resolve issues quickly.
For springtails specifically, see our article on why springtails sometimes appear dead on arrival — they often go into temporary diapause during shipping and recover within hours.
Setting Up Before They Arrive
Don't order isopods and figure out the enclosure later. Set up the enclosure 1–2 weeks before delivery so substrate can mature and any humidity/temperature issues can be ironed out.
A basic setup for hardy beginner species:
- Container: 5–10 litre clip-lock plastic tub with mesh-vented lid
- Substrate: 5–7 cm of coir mixed with crumbled hardwood, leaf litter, and a handful of horticultural charcoal
- Hides: Cork bark pieces and dried leaves
- Calcium: A piece of limestone and/or cuttlebone
- Moisture gradient: Mist one end; leave the other slightly drier
For full setup detail, our setting up and selecting your first isopods guide covers container choice, substrate layering, and the first weeks of care.
For environmental management specifically, see our humidity for isopods guide and isopod temperature range guide.
After They Arrive: The First Few Weeks
The most important rule: leave the colony alone.
Once the animals are in their enclosure:
- Day 1: Open the shipping container inside the enclosure, let the animals walk out at their own pace. Don't tip them out or handle them.
- Days 2–7: Light misting on the damp end every 2–3 days. Offer a small amount of food on day 3 or 4. Don't expect to see them much — they'll be exploring substrate and hiding.
- Weeks 2–4: Settle into a routine of misting every few days, feeding twice weekly, and gentle weekly checks. Resist the urge to rearrange the enclosure.
- Months 2–3: First gravid females usually appear. Look for animals with visibly white, swollen marsupia under the body.
- Months 3–6: Mancae (juvenile isopods) become visible. The colony is established.
For breeding-specific guidance, our how to breed isopods step-by-step guide walks through the full process. If your colony has stalled, see our breeding troubleshooting article.
Common First-Purchase Mistakes to Avoid
A few patterns that account for most beginner regrets:
Going premium first. As covered above, this is the most common mistake. Build skills with hardier species before tackling Cubaris or Ardentiella.
Buying too few. Three or four isopods is not a colony. Start with at least 10.
Not setting up the enclosure beforehand. Substrate that's been settling for two weeks is dramatically better than fresh substrate dumped in the day of arrival.
Mixing morphs immediately. Different morphs of the same species interbreed. If you want to keep distinct colour lines, separate enclosures from day one.
Buying from the wrong source. Wild-caught imports look like good deals on price but rarely establish properly. Captive-bred from a reputable UK breeder is almost always the better long-term choice.
Over-managing. Opening the enclosure daily, rearranging hides, checking obsessively. Set it up properly and leave it alone.
Frequently Asked Questions
What's the easiest isopod for a complete beginner in the UK?
Powder Orange (Porcellionides pruinosus) is widely considered the easiest first isopod — hardy, prolific, visually appealing, and forgives almost any beginner mistake. Dwarf Whites (T. tomentosa) are similarly easy and even more prolific, just smaller.
How much do beginner isopods cost in the UK?
Starter colonies of common species (Powders, Dwarf Whites, P. scaber) typically cost £10–20 from PostPods. Selectively bred Armadillidium morphs (Magic Potion, Jelly Bean, Zebra) usually run £20–35. Premium tropical species range from £40 to £100+ depending on rarity. Browse our full isopods for sale collection for current pricing.
Should I buy captive-bred or wild-caught isopods?
Always captive-bred. Wild-caught imports — particularly tropical species — have high mortality rates and rarely establish well in captivity. PostPods sells exclusively captive-bred stock, sourced in-house or via vetted UK breeders.
How many isopods do I need to start a colony?
For most species, 10–20 animals is the recommended minimum starter group. This provides genetic diversity and virtually guarantees both sexes are present. Avoid groups smaller than 10 — they often fail to establish.
Can I mix different isopod species in one enclosure?
Generally no. Different species compete for hides and food, and you'll find it harder to monitor each population. For breeding projects specifically, stick to one species per enclosure. Note that different species cannot interbreed, so there's no risk of colour dilution between species — but mixing morphs of the same species (e.g., Magic Potion and wild-type A. vulgare) will dilute lines over generations.
What's the best time of year to buy isopods?
PostPods ships year-round with appropriate temperature management (heat packs in winter, cool packs in summer). Spring and autumn are the lowest-stress times for shipping; summer heat and winter cold both require extra packaging care, which we provide by default. Order any time that suits you.
What if my isopods don't breed?
Most "not breeding" issues trace to husbandry rather than the animals themselves — typically wrong temperature, insufficient protein, or under-sized founding population. Our breeding troubleshooting guide walks through the most common causes systematically.
What if my isopods arrive dead?
Contact PostPods immediately with photos. Our live arrival guarantee covers DOA situations, and we resolve issues quickly. In the unlikely event of a problem, we'll either replace the animals or arrange another resolution that ensures your satisfaction.
Where can I buy isopods in the UK?
Browse our full collection of captive-bred isopods for sale. PostPods is a UK-based specialist breeder shipping nationwide with Royal Mail next-day-by-1pm service, live arrival guarantee, detailed species-specific care notes with every order, and a 20% overcount sent on every order as standard.
Final Thoughts
Buying your first isopods doesn't need to be complicated. Pick a forgiving species from a reputable UK breeder, start with enough animals to establish a real colony, set up the enclosure properly before they arrive, and then — most importantly — leave them alone and let them get on with what they do.
Browse our full collection to see what's currently in stock. If you're not sure where to start, the Powder Orange starter colony is the most-recommended first purchase — and our mystery boxes offer a great way to discover several species at once. Either way, you're a few clicks away from a thriving isopod colony of your own.
PostPods is a UK-based specialist breeder of isopods and springtails, supplying hobbyists, reptile keepers, and bioactive vivarium enthusiasts across Britain. All our stock is captive-bred in our own facility or sourced from vetted UK breeders, with a live arrival guarantee on every order.
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