🏛️ Old Ruins🏛️

Your fish just discovered a lost underwater civilization—and naturally, they’ve decided to move in! 🐠

The Old Ruins transforms your aquarium substrate into a mysterious ancient temple hidden beneath the sand. Designed to sit in a corner against the aquarium glass, its natural rock-textured surface entrance leads into a wide underground chamber filled with crumbling stone walls, weathered columns, arched openings, broken steps, and a detailed tiled pathway.

The open viewing side lets you watch your aquarium residents explore the ruins like tiny underwater archaeologists. It’s a sheltered hideaway for them and your own private window into a forgotten aquatic world! 🫧

Once surrounded by substrate, only the rocky surface entrance remains visible. Beneath the sand or gravel, an entire ancient ruin awaits—adding a fun surprise and a touch of mystery to your aquascape.

✨ PRODUCT DETAILS

• One 3D-printed Old Ruins aquarium cave
• One natural rock-textured surface entrance
• Wide, sheltered underground chamber
• Detailed ancient temple ruin interior
• Weathered columns and arched openings
• Broken stone steps and tiled pathway
• Open viewing side for watching through the aquarium glass
• Designed to sit against the inside of your aquarium glass
• Designed to be mostly concealed beneath substrate
• Printed in durable PETG
• Available in three standard sizes
• Custom sizing available by request

📏 AVAILABLE SIZES

Small
Width: 105mm Depth: 100mm Height: 57mm

Medium
Width: 127mm Depth: 121mm Height: 69mm

Large
Width: 149mm Depth: 142mm Height: 81mm

All sizes are measured in their normal use orientation.

🎨 AVAILABLE COLORS

• Transparent — has a naturally frosted/translucent appearance when 3D printed
• Black
• White

✨ NEED A CUSTOM SIZE?

Every aquarium—and every aquatic resident—is different! If you need the Old Ruins adjusted to better fit your tank or aquarium resident, please message us before ordering. We’re happy to create custom sizes whenever possible.

🏛️ EASY TO ADD TO YOUR AQUASCAPE

Position the open viewing side against the inside of your aquarium glass, surround and cover the cave with substrate, and leave the rocky surface entrance exposed and unobstructed. Avoid packing substrate into the interior opening, and choose a size whose smallest opening comfortably accommodates your aquarium residents.

Please rinse thoroughly with clean water before placing it in your aquarium. Avoid using soap or household cleaners.

This listing is for the Old Ruins cave only. Aquarium, substrate, rocks, plants, and animals shown in the photos are not included.

Because every cave is 3D printed, subtle layer lines and small cosmetic variations are a natural part of the printing process and make each piece unique.

Original design by Aquireef3D. Printed and sold under license by 5 Cats Prints & Things. 🐾