Professional products Raw materials Expanded Clay
Expanded clay for professional drainage, custom mixes, and hydroculture.
Arber expanded clay is an inert raw material produced by controlled thermal expansion. Available in 10 L Bag and 45 L Bag, you use it as a professional drainage layer, as a component in custom mixes for long-cycle plants, as a substrate for hydroculture, and as a decorative top-dressing for indoor pots.
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Features
Arber expanded clay is an inert raw material produced by controlled thermal expansion of natural clay. It is a lightweight, stable aggregate with high drainage capacity and strong root-zone aeration. It does not decompose. It does not alter the pH of the substrate. It does not interfere with the fertiliser components of the mix.
You use it as a professional drainage layer at the bottom of pots, as a component in custom mixes for long-cycle plants (cacti, succulents, citrus, Mediterranean species), as a substrate for indoor hydroculture, and as a decorative top-dressing for ornamental pots. The two formats — 10 L Bag for targeted applications, 45 L Bag for nursery volumes — cover the full range of professional needs.
Expanded clay from a consistent supply chain: the same production process, season after season, to ensure quality continuity from batch to batch. 30 years of selected supply chain and over 7 million m³ of substrates produced since 1996.
Why choose it
- Expanded clay produced by controlled thermal expansion — a lightweight, stable aggregate.
- It does not decompose: the physical structure remains constant for years.
- pH 6.5–7.5 and stable structure: it does not alter the substrate profile and maintains drainage properties over time.
- Compatible with hydroculture, custom mixes, and indoor decorative top-dressing.
- Available in 10 L Bag (targeted applications) and 45 L Bag (nursery volumes).
Why use it
Lightweight professional drainage
A drainage layer at the bottom of the pot that does not add weight to the outdoor container: high air capacity and low density.
Chemically inert — no profile interference
Neutral pH and stable mineral composition: no interference with fertilisers or additives in the mix.
Hydroculture compatible
The reference substrate for indoor hydroponic cultivation: stable, reusable, and neutral.
Two formats for professional use
10 L Bag for targeted applications and calibrated custom mixes, 45 L Bag for nursery volumes and systematic top-dressing.
Technical specifications
| Product category | Expanded mineral raw material |
| Raw material type | Clay |
| Origin | Italy |
| Production method | Controlled thermal expansion of natural clay |
| Water retention capacity | Low — draining |
| Air capacity | High — stable internal porosity |
| pH range (as is) | Neutral |
| Conductivity (EC) | Low |
| Bulk density | Low · stable lightweight aggregate |
| Compatibility | Universal · professional drainage, hydroculture, custom mixes, indoor decorative top-dressing |
Available formats
| Format | Units / pallet |
|---|---|
10 L | 120 |
45 L | 39 |
Arber professional raw materials
View all Arber substrates for this crop type, with selection criteria and technical comparison.
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