Beginner's Guide to Creating a Paludarium | A Natural Paludarium with Aquatic and Terrestrial Zones
Learn how to create a paludarium that recreates both aquatic and terrestrial ecosystems in a single tank. This beginner-friendly guide covers aquarium base design, land formation, selecting aquatic plants and mosses, and tips for keeping tropical fish, frogs, and lizards together.
Key Takeaways
Learn how to create a paludarium that recreates both aquatic and terrestrial ecosystems in a single tank. This beginner-friendly guide covers aquarium base design, land formation, selecting aquatic plants and mosses, and tips for keeping tropical fish, frogs, and lizards together.
What is a Paludarium?
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A paludarium derives its name from the Latin word "Palus," meaning "wetland or marsh." It's a layout that recreates a tropical rainforest's aquatic edge habitat in a single container by placing a water zone in the lower section of the tank and a terrestrial, plant-growing zone in the upper section.
It's sometimes called an "aquaterrarium" because it combines elements of an aquarium (aquatic) and a terrarium (terrestrial). Its greatest appeal is the ability to house diverse species—not just fish, but frogs, geckos, dwarf chameleons, and crabs.
Choosing the Right Tank for a Paludarium
Tall Tanks are Essential
Since the space above the waterline (the terrestrial and plant zone) is crucial in a paludarium, a tank with ample vertical height is ideal.
30×30×45cm or larger tall-format tanks are best for beginners
You can also combine reptile mesh cages with transparent panels
Glass cages with double doors make feeding and maintenance easier
Setting Water Depth
The water level typically should be about 1/3 to 1/2 of the tank's total height. If too shallow, tropical fish won't have enough space to swim; if too deep, the terrestrial zone becomes cramped.
Materials for Landscaping the Terrestrial Area
Foam + Flooring Coating Method
This is the most popular landscaping technique.
Use a knife to carve foam into rock and cliff shapes
Secure with aquarium-safe silicone sealant
Cover the surface with a coating made from cork bark, peat moss, and coconut shell charcoal
After fully drying, rinse with water and add livestock
Lava Rock and Pumice Stacking Method
Stack lava rocks or pumice stone bonded with silicone to create rocky areas. Since the materials are natural, they're safe for inhabitants and provide an excellent surface for beneficial bacteria to establish.
Sump Stone (Oyama Stone)
A simple method requiring no DIY—just stack beautifully formed stones. Recommended for beginners.
Microsorum Pteropus: Anchors to driftwood and stone, grows slowly, easy to maintain
Willow Moss: Strong anchoring ability, thrives in both aquatic and semi-aquatic conditions
Terrestrial Section (Terrarium)
Ficus Pumila (Creeping Fig): Creeps across glass surfaces attractively
Pothos: Vigorous grower that quickly verdures the terrestrial zone
Flame Moss and Selaginella: Forms dense, mounding growth in high-humidity environments
Tillandsia (Air Plants): Require no soil, easily attach to gaps in the terrestrial zone
Compatible Species Combinations
Aquatic (Tropical Fish)
Neon Tetras and Cardinal Tetras: Adaptable to a range of water conditions, brilliant colors
Corydoras Catfish: Bottom feeders that consume uneaten food
African Dwarf Frog: Fully aquatic frog, can be kept entirely underwater (no terrestrial zone needed)
Golden Honey Gourami: Peaceful small gourami well-suited to paludariums
Terrestrial and Shoreline
Japanese Newt: Semi-aquatic amphibian preferring waterside environments; native to Japan, making temperature management easier
Toad Tadpoles (can be kept in semi-aquatic conditions)
Stinkpot Turtle (small turtle, primarily aquatic): Provide some terrestrial area
Caution: Predator-Prey Relationships
When cohabiting fish with terrestrial reptiles, verify beforehand that the reptiles won't prey on the fish. Geckos are at risk if they fall into water, so maintain sufficient distance between the water surface and terrestrial area.
Maintenance Tips
Humidity Control
In a tropical rainforest setting, 80–90% humidity is ideal. Mist 1–2 times daily with a spray bottle or use an automatic misting system. Ventilation is important to prevent mold in overly humid conditions.
Lighting
Growing both aquatic and terrestrial plants requires adequate light. Use full-spectrum LED aquarium lighting for 10–12 hours daily. If keeping reptiles that need UVB, add a dedicated UVB lamp.
Water Changes and Filtration
Small sponge or undergravel filters work well for paludariums as they create gentle water flow. Perform a 20–30% water change 1–2 times weekly. Since soil and organic matter from the terrestrial zone easily wash into the water, regular substrate cleaning with a siphon is essential.
Conclusion
Building a paludarium is itself a creative and rewarding process. This aquarium brings a miniature tropical rainforest into your home. From material selection to landscaping and plant placement, create your own unique space. The vibrant activity of its inhabitants offers a charm distinctly different from traditional aquariums.
