Part no.
PT3133
Size
45 x 60 x 0.1 cm
Delivery
Oversize
Part no.
PT3131
Size
30 x 30 x 0.1 cm
Delivery
Oversize
Part no.
PT3132
Size
45 x 45 x 0.1 cm
Delivery
Oversize
Exo Terra Bio Drain Terrarium Draining Mesh
The mesh layer that keeps a bioactive drainage system working. Exo Terra Bio Drain Terrarium Draining Mesh separates your soil and substrate from the drainage layer beneath, stopping soil migrating down and clogging the drainage zone while still letting excess water pass through. It's cut-to-fit and non-toxic, and it comes in three sizes to match different terrarium footprints.
Key features
- Separates substrate from drainage layer – keeps soil out of the Bio Drain Substrate below it.
- Prevents waterlogged, sour substrate – lets water pass through to the drainage layer instead of pooling in the soil.
- Supports healthy plant roots – a clean drainage layer means roots aren't sitting in stagnant water.
- Cut-to-fit – trim to match your terrarium's internal footprint.
- Non-toxic, non-decomposing material – won't break down or leach into a bioactive build.
Specifications
| Mini | 30 × 30 cm (SKU AA0740) |
|---|---|
| Small | 45 × 45 cm (SKU AA0739) |
| Medium | 45 × 61 cm (SKU AA0741) |
| Material | Non-toxic, non-decomposing mesh |
Which size do I need?
| Mini | Small | Medium | |
|---|---|---|---|
| Footprint | 30 × 30 cm | 45 × 45 cm | 45 × 61 cm |
| Best suited to | Nano and mini terrariums | Small terrariums, or multiple pieces for a larger floor | Medium to medium-tall terrariums, or as the largest single piece for bigger builds |
For a terrarium floor larger than the Medium size, combine multiple mesh pieces cut to fit rather than stretching one piece across the whole footprint.
What's included / what you'll still need
The pack contains the mesh only. You'll also need Exo Terra Bio Drain Substrate underneath it and your chosen soil or substrate on top.
Suitable for, and not suitable for
Suited to any planted, humid or bioactive terrarium build using the Bio Drain drainage system. Not a standalone substrate – it always sits between the drainage layer and the soil, not as a surface layer on its own.
Care and maintenance
Trim with scissors to match your terrarium's internal dimensions. Rinse before use to settle packaging dust.
Warranty and delivery
Covered by your rights under Australian Consumer Law. Ships standard.
Goes well with
- Exo Terra Bio Drain Substrate, laid beneath the mesh
- A planted soil mix for the layer above
- Live plants or moss for a bioactive top layer
Common questions
Can I cut it smaller than the pack size?
Yes – it's designed to be trimmed to fit your terrarium's internal footprint with scissors.
Which size fits a standard medium terrarium?
The Medium (45 × 61 cm) is sized for Exo Terra's medium and medium-tall terrarium footprints. Check your enclosure's internal base dimensions before ordering.
Do I need the substrate as well?
Yes – the mesh is designed to sit on top of Exo Terra Bio Drain Substrate, not to replace it.
Can I join multiple pieces for a bigger terrarium?
Yes, overlap or butt multiple cut-to-fit pieces together to cover a larger floor than one piece allows.




