Know your companions
Porcellio laevis
Milkback is the trade-line name used for this Porcellio laevis culture. A pale dorsal area contrasts with darker gray-brown sides. Unlike Armadillidium pillbugs, Porcellio do not close into a complete defensive ball. Keep the line label with the culture rather than identifying animals by color alone.
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Build the stronghold
A refuge beneath the leaves
Use about 8–10 cm of organic substrate with decaying hardwood and a generous hardwood leaf layer. Add several bark shelters and more than one feeding point as numbers grow, so smaller animals can reach food without gathering in one exposed spot.
Choose clean, pesticide-free materials and substrate without fertilizer or other chemical additives. Do not rely on plain coco fiber as the whole food supply. Secure ventilation openings against escapes, place the enclosure away from direct sun, and prepare it before the animals arrive.
Give them a choice
Two paths through the habitat
Keep one side damp with moss and hydrated substrate, and the other side somewhat drier. Milkback needs moisture access alongside fresh air. Avoid both a bin that dries throughout and saturated bedding with stagnant air.
Air humidity alone cannot tell you whether the substrate under a hide is suitable. Check the refuge gently, keep cover in place, and adjust watering to ventilation and room conditions. Small juveniles need nearby sheltered moisture too.
Stock the royal pantry
Provisions for a living colony
Keep leaves, decaying wood and calcium available. Offer small portions of suitable protein, such as prepared isopod food or dried shrimp, alongside occasional vegetables. Increase portions only when consumption supports it; excess protein can spoil quickly.
A suitable calcium source, such as cuttlebone, should remain accessible. Fresh and protein foods supplement the habitat's decaying plant material. Remove spoiled leftovers, reduce the next portion when food persists, and keep an eye on leaf cover as the colony grows.
Steady care, patient growth
Take up the colony watch
On arrival
Have the enclosure ready before opening the shipping container. Follow our arrival and acclimation guide, and give the colony a quiet place to settle.
During maintenance
Check moisture, leaf cover, leftovers and airflow. Observe a familiar shelter without overturning every hide. Watch food consumption as numbers rise and add feeding locations rather than placing a large heap in one corner.
Give pale or molting animals space and avoid peeling away old shell. Females carry developing young in a brood pouch; growth varies with age, conditions and the starting group. Do not expect a fixed breeding timetable. Never release captive isopods outdoors.
A role in the living habitat
Every companion has a place
Milkback can be an effective decomposer where its needs match the enclosure, but its appetite deserves care around vulnerable soft-bodied animals, eggs or slow-moving inhabitants. Establish a separate reserve culture and assess compatibility before mixing animals.
Continue removing excessive waste and checking the needs of every inhabitant. A cleanup crew supports routine care; it does not replace it.
Observe before you adjust
Read the signs along the trail
| What you notice | First checks |
|---|---|
| Refuge drying out | Inspect beneath the moss; restore moisture gradually without flooding. |
| Mold on fresh food | Remove leftovers and review portion size, water and airflow. |
| An overheated enclosure | Check sunlight and nearby heaters; protect the culture from heat. |
| Repeated losses | Record conditions and recent changes. Send clear photos to our keeper team. |
These are habitat checks, not diagnoses. If problems continue, ask Isopod King for help before making several large changes at once.
From the keeper’s camp
Questions along the journey
Can I combine Milkback with other color lines?
For a dependable Milkback culture, keep the named line separately. Mixing cultures complicates identity and appearance; similar labels are not a substitute for knowing the source of each group.
How often should I water?
Use the condition of the damp refuge as your guide. Ventilation, substrate depth and room conditions change how quickly it dries, so check it and water selectively instead of following one fixed schedule.
Where can I continue learning?
Explore moisture gradients, feeding essentials and your first 30 days in the Care Archives.
Find your colony
Begin your Milkback colony story
Milkback Isopods
Porcellio laevis
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The keeper’s journal
Your colony’s ongoing story
Watch food consumption as numbers rise and add feeding locations rather than placing a large heap in one corner. A few short notes on watering, feeding, molts and enclosure changes help reveal patterns without constant disturbance.
- Keep a usable damp refuge.
- Replenish leaves, suitable wood and calcium.
- Remove spoiled supplements.
- Record changes and ask for help when needed.
Care guide reviewed October 25, 2026. Speak with the Isopod King keeper team →