Door and window
Two architectural openings create visual interest and separate access points.
Website-exclusive pricing · New designs arrive here 7 days before Etsy
Hidden underground aquarium house
Secret House Aquarium Décor Hide
A story-rich buried shelter with a doorway, window, and rocky roofline that looks like a forgotten room beneath the aquascape.
$17.99$19.9910% lower than Etsy
Made to order · Ships in 1–5 business daysU.S. shipping $5.99 for the first item · +$1.99 each additional item · Shipping details
PETG plasticFor freshwater or saltwater aquariums
14 matte colorsChoose the finish that fits your aquascape
Simple careRinse with clean water before tank placement
A little architecture below the surface
Hide a secret room beneath your tank landscape.
Secret House combines an underground cave with architectural detail. Bury the body beneath sand or fine gravel and leave the doorway, window, and rugged upper edge visible to create the look of a hidden dwelling built into the terrain.
It adds narrative character to freshwater aquariums, shrimp and betta tanks, planted aquascapes, fantasy layouts, and display builds without sacrificing usable shelter space.
Underground room
Uses the substrate layer to conceal a surprisingly spacious interior.
Storybook detail
Rock texture and masonry-inspired surfaces give the aquascape a hidden-world feeling.
Size, placement, and comparison
Leave the architecture visible without crowding the entrances.
Secret House is longer than it is wide, with height concentrated around the roofline. Use a paper footprint to test the selected size and preserve enough front or side clearance to see and maintain the doorway and window.
Placement plan
Place the base securely, build substrate around the buried body, and keep the doorway, window, and intended upper details uncovered. Do not wedge the structure tightly against glass or hide an entrance behind unstable stone.
Fit check
Use the full exterior measurements to confirm tank clearance. Because the listed dimensions are not doorway or interior measurements, compare the product photos with the animal’s adult shape before treating any opening as a swim-through.