Bioscape Holy Rock Replica 20 x 16 x 15cm Large
Water type
Freshwater + Marine
Bioscape Holy Rock Replica 20 x 16 x 15cm Large
A compact holey rock replica with genuine swim-through tunnels. The Bioscape Holey Rock Replica is a 20 x 16 x 15 cm hand-crafted, hand-painted resin casting in a natural grey stone tone, modelled on holey (honeycomb) rock. Like the rest of the Bioscape rock replica range, it's non-toxic and chemically inert, so it's safe for both freshwater and marine tanks once rinsed.
Key features
- Tunnelled, not just textured — cavities run through the piece, giving fish and shrimp real swim-through routes rather than a single shallow recess.
- Natural grey stone finish — a neutral tone that sits well against most substrates and doesn't compete with plant or coral colour.
- Non-toxic, inert resin — won't affect pH, KH/GH or general water chemistry.
- Freshwater and marine safe — one piece for planted, community, cichlid or reef-adjacent set-ups.
- Compact large format at 20 x 16 x 15 cm — sized for a mid-tank feature piece rather than a full-width centrepiece.
Specifications
| Dimensions (L x W x H) | 20 x 16 x 15 cm |
|---|---|
| Material | Hand-painted, non-toxic resin |
| Finish | Natural grey stone replica |
| Water type | Freshwater and marine |
| SKU | BIS317 |
Which one do I need?
Bioscape sells this holey rock replica in two finishes and two sizes. Use the table below to compare this piece against its golden sibling.
| Product | Dimensions | Finish |
|---|---|---|
| Holey Rock Replica Large (this piece) | 20 x 16 x 15 cm | Natural grey stone tone |
| Holey Rock Golden Replica Large | 27 x 24 x 14 cm | Warm golden/sandstone tone |
Pick this grey Holey Rock Replica where you want a cooler, more neutral hardscape tone or a smaller footprint for a mid-sized tank; pick the Golden Replica for a larger centrepiece or a warmer-toned aquascape.
Suitable for, and not suitable for
Suitable for freshwater community, cichlid and planted tanks, and marine or reef-adjacent displays. Not suitable as a structural support for other equipment — it's an ornament, not a rated shelf or platform.
Care and maintenance
Rinse thoroughly before use. As a resin casting rather than natural rock, it won't leach tannins or affect KH over time, so it can go straight into a cycled tank after rinsing.
Warranty and delivery
Covered against manufacturing defects on arrival, in addition to your rights under Australian Consumer Law. Standard freight.
Common questions
Is this real rock?
No, it's a resin replica hand-painted to resemble natural holey rock, so it won't affect water hardness the way some real rock does.
Is it reef safe?
Yes — it's chemically inert and safe for marine and reef-adjacent tanks once rinsed.
How big is it really?
20 cm long, 16 cm wide and 15 cm tall — sized for a mid-tank feature rather than a full-width centrepiece.
How does it compare to the Golden Replica?
Same tunnelled construction, but this one is a natural grey tone and the smaller of the two pieces.
