Trusted by 12,000 customers • 2,000 verified reviews on Etsy

Aquarium caves made to blend in. Tested in planted tanks.

Explore Caves Now
Handmade to order. Limited stock available.
Free worldwide shipping over €30
30-day money back guarantee
Aquarium-safe and easy to clean

Trusted worldwide

12,000 customers and 2,000 reviews

Global free shipping

Free shipping on orders over €30. Packed with care for safe arrival

Tested in real tanks

Designed by an aquascaper, made with aquarium-safe materials, does not affect water chemistry

Handmade & independent

Carefully crafted by a small independently owned business

Creations by our customers

Aquarium caves

Large, accessible entrances designed for planted aquariums. Tested in real tanks for stunning visuals, easy cleaning, and simple maintenance.

Shop Aquarium Caves

Terrarium caves

Small entrances and cozy hides designed for reptiles that need privacy, security, and dark resting spots.

Shop Terrarium Caves
why hollow?

Not all aquarium caves are created equal

Mass-produced and generic cave decor is designed to look good in photos. We create caves for real life use.
Hollow Generic caves Mass produced
Easy to clean & maintain
Tested in planted tanks
Aquarium-safe materials
Blends naturally into the tank
Designed by an aquascaper
Multiple sizes available
Worldwide free shipping
30-day money back guarantee

Rated 4.8/5 by 2000 Etsy customers

Read reviews from our shop and see why thousands of customers trust Hollow.

★ ★ ★ ★ ★

Grace

I should have waited to review until my tank was all set up but I just can't wait. I will 1000% order again. The color is absolutely perfect and matches my river rock substrate perfectly and I believe it will blend in beautifully. The only challenge will be deciding which one to get next because the possibilities seems endless with how you could arrange these! It's often hard for me to find hides large enough for my freshwater crayfish but I am thrilled to have found this shop! Thank you so much for making it easy to order, great communication, good prices, packaged with care- I will be back for more!

★ ★ ★ ★ ★

Kloey

This seller is so nice to work with and is very communicative! They were able to make the product a customer size that works for my geckos tank. Both items I ordered arrived (US) very quickly which was awesome!

★ ★ ★ ★ ★

Amber

I cannot say enough good things about this product! It is always hard to tell the exact scale of things from images, but this print is thicker than I was expecting so it is nice and sturdy. It will certainly hold up and is easy to work with. My tarantula loves it! It makes me wish that I had more spiders to buy these for just to support the maker of such a great thing!

★ ★ ★ ★ ★

Ela

Have purchased several items and absolutely love them all! Super high quality with a smooth but textured surface making them very easy to use and maintain within my aquariums. Always my go to and the continued new releases will keep me coming back! Highly suggest!

★ ★ ★ ★ ★

Magnus

Love it! Bought a different one before and put one in each front corner of my aquarium. Its really sturdy and over all really nice material and texture. Rough makes it blend in in a nice way.

★ ★ ★ ★ ★

Tyler

I love this shop, the product was very well made and durable. It is the perfect addition to my bearded dragon terrarium. Super amazing customer service. I had made a mistake and put the wrong shipping adress in. But when aqua decor 3d found out about this they promptly fixed it and today I got the package. I cant wait to shop again for something else at this store. Its been a great expirence. Thank you.

★ ★ ★ ★ ★

Conor

Absolutely wonderful item!!! My first time buying anything on ETSY and With this level of quality crafts I’ll be ordering much more from “Aqua Decor 3D” and other Sellers!! Item is exactly as expected. Item came in time frame I expected. Item is one I could only get here after days of web searches. 100% Happy First Time Customer Thanks William.

★ ★ ★ ★ ★

Takbir

Description of item matches what was received.. From EU to AU, item was delivered earlier than expected.. build quality, craftmanship, form, elegence, outstanding!.. can't wait to scape my tank with this.. 😍😍😍

★ ★ ★ ★ ★

PeapodMommy

This item exceeded my expectations! The high quality really shows in the piece. The piece provides cover for my fish (& future shrimps) very well while fitting with the natural theme in the tank. Customer service was also outstanding! I was worried about the shipping process from a different country, but the Seller was very kind and responsive. Would recommend to all 10/10!

★ ★ ★ ★ ★

Pouriya

He is one of the most creative person in making Aquarium equipment and decorating. The quality and the customer service of this guy was amazing, highly recommended. Pouriya Hamzehlouee From Canada

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