Exo Terra Coco Husk 4.4L Bag PT2785 | Coconut Fibre Terrarium Substrate

The ET Coco Husk 4.4L Bag (PT2785) is a natural coconut husk fibre substrate designed for tropical vivarium set-ups housing humidity-dependent reptiles, amphibians, and invertebrates. Sourced from coconut plantations in Vietnam (Cocos nucifera L.) and processed to a consistent, ground and sieved texture, it gives keepers a substrate that actively manages terrarium conditions rather than just sitting on the floor.

Natural Humidity Regulation

Coconut husk fibre has hygroscopic properties — it absorbs and releases moisture in response to the surrounding environment, helping to stabilise humidity levels naturally. This makes it well suited to species where consistent air humidity is critical for shedding and respiratory health, including tropical frogs, salamanders, burrowing snakes, and invertebrates.

Processing and Safety

• Triple machine washed to remove residual salt content
• Machine dried and heat-treated to reduce bacterial contamination
• Ground and sieved for consistent particle size
• Non-toxic, free from chemicals and pesticides
• Highly resistant to mould and decay

Substrate Performance

Beyond humidity control, the fibre structure supports good drainage and aeration through the substrate bed, which encourages healthy waste-reducing micro-organisms. This keeps the vivarium fresher for longer between full substrate changes. Spot cleaning daily and replacing fully when needed is straightforward — and the used substrate can be composted safely in the garden.

Directions for Use

Spread a 5–10 cm layer across the terrarium floor, then water or mist to reach the required humidity level. Monitor with a hygrometer. For species with very high humidity demands or in well-ventilated enclosures, placing a substrate heater beneath the terrarium helps drive moisture upward more effectively.

A sustainably sourced, thoroughly processed substrate — the ET Coco Husk 4.4L Bag gives keepers a reliable foundation for bioactive and high-humidity tropical builds without unnecessary additives or guesswork.