Why it works
- Six open-through tunnelsTwo staggered rows of three, open at both ends.
- One piece, no assemblyPrinted as a single shelter in black PETG.
- Rounded openingsRounded tunnel corners and smooth passage geometry.
- Three sizes, one layoutSmall, Medium and Large share the same six-tunnel design.
What's included
Showing the Small
- 1Small shelter
Not included: Fish, plants, substrate and other aquarium decor.
Dimensions & details
- Outside (W × D × H) · Small
- 5.12 × 3.94 × 2.34 in 130 × 100 × 59.5 mm
- Each tunnel (W × H × L) · Small
- 1.38 × 0.98 × 3.94 in 35 × 25 × 100 mm
- Tunnels
- 6, open at both ends two staggered rows of three
- Construction
- One piece no assembly required
- Material
- Black PETG layer texture and finish vary between prints
Before use, safety & care
Rinse thoroughly in clean, dechlorinated water before first use. Do not use soap or household detergents. Inspect for damage, sharp edges or loose material.
Submerge while tilting to release trapped air, and check that the shelter rests securely. Keep both ends of every tunnel clear of substrate, glass and other decorations.
Monitor placement and livestock after installation, and remove the shelter if a concern arises. Never force a fish into an opening. Check for occupants before lifting, and clean regularly with a suitable soft brush.
Questions
Which size should I choose?
Compare each size's tunnel opening with your fish's body and fins, and choose comfortable clearance. Size names do not guarantee suitability for any particular species or adult size.
Do the photos show every size?
The product photos show the Small size. Medium and Large follow the same six-tunnel layout, so use the dimensions for your chosen size.
Does it need assembly?
No. Each shelter is printed as one piece.





