Why do fish and shrimp need hides?

Hides give fish and invertebrates a place to retreat when stressed, rest between feeding, and establish territories. They mimic natural environments, making your aquarium inhabitants feel safe and secure.

Are 3D-printed aquarium hides safe?

Yes — when printed using aquarium-safe materials like PETG, hides are non-toxic and safe for long-term underwater use. Our designs are made to be smooth and snag-free to protect delicate fins and antennae.

How big are the entry holes?

Each hide in this set features 2.5 cm (1 inch) entry holes, ideal for shrimp, guppies, corydoras, and even small plecos. These openings are large enough for easy access while still feeling safe and enclosed.

Will these hides work for plecos and bottom dwellers?

Absolutely. Plecos, corydoras, loaches, and other bottom-dwelling species love having multiple sheltered areas. The 3-piece set allows you to spread hides across the tank to reduce competition for space.

Do the hides blend into aquascapes?

Our coral-inspired texture and neutral tones make them perfect for both natural and stylised tank layouts. They can be placed among plants, rocks, or driftwood without looking artificial.

What are aquarium hides used for?

Aquarium hides provide shelter and a safe retreat for fish, shrimp, and other tank inhabitants. They reduce stress, encourage natural behaviours, and create a more balanced tank environment.

Why choose a 3D-printed fish shelter?

3D-printed shelters are lightweight, durable, and can be made in unique shapes and textures not possible with traditional resin decor. Our designs are made using aquarium-safe PETG material.

What size fish is this large shelter suitable for?

Our large coral shelter measures approximately 13 x 13 x 13 cm with 2.5 cm entry holes — perfect for small plecos, corydoras, shrimp, and medium-sized community fish.

Is this shelter safe for planted tanks?

Yes. The smooth PETG finish ensures it won’t damage plants or fish, and its coral-inspired design blends well with aquascaping layouts.

Can the large shelter be used in saltwater aquariums?

Absolutely. PETG is non-toxic and suitable for both freshwater and saltwater tanks, making this shelter a versatile choice for a wide range of aquariums.

What size cave is best for bettas?

25–30 mm entrances suit most bettas, giving them shelter while still letting them turn and swim out.

Are 3D-printed caves safe for shrimp and fish?

Yes — our caves are made from aquarium-safe PLA/PETG with no coatings or paints. Always rinse before placing them in your tank.

Can these caves be used in saltwater tanks?

Yes — the material is inert and unpainted, making them suitable for both freshwater and marine aquariums.

Where are Blubber Cove caves made?

Every piece is designed and 3D-printed in our UK family-run workshop, tested in real aquariums, and shipped quickly.

Where do you ship from?

All orders ship from Northumberland, UK. Dispatch usually takes 2–4 business days.

Do you ship internationally?

Yes — tracked international delivery is available at checkout. Shipping times vary by location.

How do I track my order?

Once your order ships, you’ll receive a tracking link by email. UK parcels are sent via 48-hour tracked service; international orders include tracking.

Do you take custom requests?

Yes — tweaks, scale changes, or new ideas are welcome. Contact us via the site and we’ll confirm what’s possible.

What materials do you use for aquarium décor?

We print in PETG or PLA depending on the design. Both are aquarium-safe plastics that won’t leach chemicals. Pieces are finished smooth to protect fins, shrimp and snails.

Are your aquarium products fish- and shrimp-safe?

Yes. All tank items are designed for fish and shrimp use with no coatings, paints or glues — just inert plastics hobbyists trust.

How do I care for aquarium décor long term?

Rinse in tank water during water changes. Avoid boiling or harsh scrubbing. With light care, the décor lasts for years without warping or releasing toxins.

Do your floating hides actually float?

Yes — each one is buoyancy-tested before shipping. Some tanks may need a gentle nudge or a suction cup to settle them in place.

Can shrimp or fry use these caves?

Yes — caves are designed with small entrances and smooth edges so shrimp, fry and nano fish can hide safely without risk.

Can I put the décor straight into my tank?

Yes — give it a quick rinse in tank water first to remove dust and help it settle naturally.

How many cards fit in your deck boxes?

Most designs hold 100+ single-sleeved Magic: The Gathering cards with room for tokens or dice. Check each listing for exact capacity.

What materials are used for deck boxes?

Durable PLA/PETG that keeps its shape over time. We craft in small batches so every hinge and latch is tested.

Can I customise a deck box?

Yes — custom requests such as scale changes, colour swaps or simple engravings can be discussed via our contact page.

Are Blubber Cove aquarium ornaments safe for fish?

Yes — all décor is printed in aquarium-safe PLA or PETG with no coatings or paints. Smooth edges protect fins, shrimp and snails.

Can these ornaments be used in betta or shrimp tanks?

Yes — entrances are sized for bettas, shrimp and small fish. They provide secure hides while blending into natural aquascapes.

Do your floating hides actually float?

They do — each floating piece is buoyancy-tested before shipping. Some tanks may need a gentle nudge to settle in place.

Where are your aquarium accessories made?

All pieces are designed and 3D-printed in our UK family-run workshop, tested in real aquariums and shipped directly from Northumberland.

The Best Hiding Spots for Aquarium Fish & Reptiles — And Why They Matter

August 8, 2025

At BlubberCove, we design and handcraft aquarium and terrarium hides that combine expert knowledge with precision 3D printing. Whether you keep shrimp, betta, bottom dwellers, axolotls, or reptiles, hiding spots are not “just décor” — they’re essential for your animals’ health, safety, and natural behaviour.

Below, we answer the most-searched questions about hides, backed by real aquascaping and herpetology experience.

Looking for safe caves for shrimp, bettas and plecos? Explore our UK-made Aquarium Caves Collection here

Why Do Fish, Shrimp, and Reptiles Need Hiding Spots?

In nature, fish, invertebrates, and reptiles instinctively seek shelter to:

Reduce stress — hiding reduces constant visual contact with other animals.
Avoid predators — even in safe tanks, animals retain this instinct.
Rest properly — shaded spots allow animals to recharge without constant light exposure.
Mimic natural environments — caves replicate rock overhangs, root tangles, and burrows.

Where Should I Place a Fish or Reptile Cave?

Position near plants, driftwood, or background décor to blend in.
Avoid blocking main swimming or roaming areas.
For aquariums: place caves where flow is gentle, not in high-current zones.
For reptiles: ensure caves are in both warm and cool zones to allow thermo-regulation.

How Many Hiding Spots Should I Have?

Rule of thumb: one per animal, plus one extra to prevent competition.
For mixed species tanks or enclosures, add more — shrimp, for example, benefit from several smaller hides spread out, while a betta might prefer one main retreat.

Can Caves Reduce Aggression in Tanks?

Yes. Breaking line-of-sight between fish or reptiles reduces fighting. Caves create territorial boundaries, so even naturally feisty species are less likely to clash.

Best Materials for Aquarium & Reptile Caves

PETG — Ideal for larger, structural hides that need strength and won’t snag fins.
PLA — Great for smaller, detailed accessories.
Natural rock & wood — Attractive, but heavier and harder to clean.

At BlubberCove, we use PETG for our big, structural caves and PLA for smaller, detailed designs — ensuring safety, durability, and easy cleaning.

Recommended Hiding Spots from BlubberCove

Large Aquarium Cave for Shrimp, Betta & Bottom Dwellers

Smooth PETG surface — no fin or tail snags.
Two sizes — perfect for shrimp, betta, kuhli loaches, and other bottom dwellers.
Availabile Here

Corner Aquarium or Reptile Tunnel Cave — Underground Hideout

Fits snugly in corners to save space.
Suitable for fish, shrimp, axolotls, lizards, and more.
Availabile Here

FAQ — Quick Answers for Fishkeepers & Reptile Owners

Q: Are PETG and PLA safe for aquariums?
A: Yes — both are aquarium-safe when printed and finished correctly.

Q: Where should I put a cave in my tank or enclosure?
A: Near plants or décor, away from high traffic areas.

Q: How many hiding spots should I have?
A: One per animal, plus one extra to avoid disputes.

Q: Do caves really reduce stress?
A: Yes — they give animals a retreat, lower aggression, and create a more natural-feeling habitat.

Q: Can I mix different types of hides?
A: Absolutely — variety encourages exploration and natural behaviour.

Bottom Line

If your tank or enclosure doesn’t have enough hiding spots, you’re missing one of the easiest ways to improve animal welfare. Whether it’s for shrimp, fish, or reptiles, the right hide changes everything.

At BlubberCove, we don’t just sell caves — we design them with animal behaviour in mind, using safe materials and aquascaping principles to make them look as good as they function.

🐚 More From BlubberCove Experts

Looking for more tips, inspiration, and expert advice for your aquarium or reptile habitat? Explore our latest guides:

BlubberCove is your trusted source for aquarium and reptile habitat tips, designs, and expert product recommendations.

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