Bur Oak Acorn Caps (Pack of 5)

Bur Oak Acorn Caps — Charming Natural Enrichment for Isopods & Bioactive Setups

Bur Oak Acorn Caps are a delightful natural bioactive terrarium supply for terrariums and isopods. Their distinctive fringed, mossy texture makes them one of the most unique acorn caps available — and isopods love them! Use them as natural hides, foraging surfaces, or simply as a beautiful addition to your setup's aesthetic.

Each pack contains 10 acorn caps for £1.00.

Why Isopods & Millipedes Love Bur Oak Acorn Caps

• Unique fringed texture — The distinctive mossy fringe creates extra nooks and crevices that isopods love to tuck into, rest, and moult safely away from disturbance.
• Natural hides — Their cup-like shape provides a snug, sheltered retreat for smaller isopod species and juveniles.
• Excellent foraging surface — The textured surface is quickly colonised by biofilm and fungi, giving your colony a rich foraging surface to graze on.
• Natural food source — As caps slowly soften and break down, isopods and millipedes will graze on the organic matter that develops.
• Drives the decomposition cycle — Perfect for clean-up crews and healthy ecosystems, feeding beneficial bacteria and microfauna as they break down.
• 100% natural & chemical-free — Sustainably sourced and safe for all bioactive inhabitants.

Great for Reptiles & Amphibians

• Dart frogs & tree frogs — Their small size and cup shape make bur oak acorn caps ideal for nano vivarium builds, adding naturalistic ground detail and supporting microfauna populations.
• Lizards & geckos — Add charming ground-level enrichment and naturalistic texture to bioactive vivarium builds for species such as mourning geckos and day geckos.
• Salamanders & newts — Scattered across the substrate, they provide foraging surfaces and sheltered microhabitats for terrestrial salamander species.

Great for Aquariums & Aquatic Setups

• Shrimp tanks — Dwarf shrimp such as Neocaridina and Caridina love to shelter inside and graze on the biofilm that develops on bur oak acorn caps — a popular shrimp tank addition.
• Blackwater aquariums — Release gentle tannins into the water, contributing to a soft, acidic environment that benefits bettas, tetras, and dwarf cichlids.
• Nano tanks & paludariums — Their compact size makes them perfect for nano aquascapes and the terrestrial zone of paludarium builds.

Great for Small Pets

• Hamsters, gerbils & mice — Small rodents enjoy investigating and interacting with textured natural objects, adding foraging enrichment and interest to their enclosures.
• Rats — Can be scattered through the enclosure to encourage natural exploratory and foraging behaviour.

Great for Invertebrates

• Tarantulas & scorpions — Add natural ground cover and texture to bioactive tarantula and scorpion enclosures.
• Stick insects & beetles — Provide foraging surfaces and naturalistic detail in invertebrate enclosures.
• Hermit crabs — Acorn caps are a classic hermit crab enclosure addition, adding organic matter and natural texture.

Great for Birds

• Finches, canaries & budgies — Small birds enjoy pecking at and interacting with natural seed pods and caps, adding stimulation and variety to their environment.
• Planted & bioactive aviaries — Scattered across the aviary floor, bur oak acorn caps add a charming woodland aesthetic and encourage natural foraging behaviours.

A high-quality organic material for bioactive setups UK-wide, suitable for reptiles, amphibians, aquariums, small pets, birds, and microfauna habitats, as well as all isopod and millipede species including Porcellio scaber, Armadillidium vulgare, Cubaris sp., Narceus sp., and many more.

Disclaimer: While every effort is taken to ensure our products are safe for use, we strongly recommend cleaning and sterilising them yourself before introducing them to your enclosure.