Paludarium Setup Guide: Land Meets Water in One Tank

What Is a Paludarium?
Planning Your Land and Water Ratio
Tank Selection
Building the Land Section
Waterfall and Drip Wall Features
Plant Selection for Paludariums
Lighting Requirements
Misting Systems and Humidity
Livestock Options
Maintenance Guide
Frequently Asked Questions

What Is a Paludarium?

A paludarium combines terrestrial and aquatic environments within a single enclosure. The word derives from the Latin “palus” (meaning marsh or swamp) and “arium” (a place for). Unlike a standard aquarium that is entirely submerged, a paludarium features a land section above the waterline alongside an underwater area, creating a miniature ecosystem that mimics a riverbank, swamp or tropical shoreline.

Paludariums have been growing in popularity among hobbyists in Singapore, and for good reason. Singapore’s natural climate — warm, humid and tropical — is perfectly suited to the conditions most paludarium plants and livestock require. While hobbyists in temperate countries must invest heavily in heating and humidifying equipment, Singapore’s ambient conditions (28-32 degrees Celsius, 70-90 per cent humidity) do much of the work naturally.

Whether you want a lush jungle scene with a waterfall cascading into a planted aquarium below, or a simple mossy rock face above a shrimp tank, the paludarium format offers creative possibilities that a conventional aquarium cannot match.

Planning Your Land and Water Ratio

Before purchasing materials, decide how much of your enclosure will be land and how much will be water. Common ratios include:

30% land / 70% water: A small land shelf or ledge above a substantial aquatic section. This is the easiest format and works well if you want the aquarium to remain the primary focus with a natural-looking terrestrial accent above.
50% land / 50% water: An equal split that creates a balanced marsh or riverbank scene. This offers the most creative flexibility but requires more structural planning.
70% land / 30% water: A predominantly terrestrial setup with a shallow pool or stream at the base. This suits hobbyists more interested in terrestrial plants, mosses and possibly dart frogs or geckos, with the water section playing a secondary role.

Sketch your design on paper before you begin. Consider where the waterline will sit, how water will flow between sections, and where you will place equipment (filter intake, heater, pump). A clear plan saves hours of frustration during construction.

Tank Selection

Standard aquariums can work for paludariums, but purpose-built enclosures are preferable:

Tall tanks: Extra height provides vertical space for the land section and climbing plants. A tank that is 50-60cm tall gives you room for a meaningful land area above 20-30cm of water.
Front-opening (terrarium-style) tanks: These feature hinged or sliding glass doors on the front, making it easy to access the land section for planting and maintenance. Exo Terra and custom-built front-opening enclosures are popular choices.
Low-iron glass: Provides clearer viewing of both land and water sections without the green tint of standard float glass.
Open-top tanks: Allow plants to grow above the rim and provide easier access. However, open tops increase evaporation — though in Singapore’s humid climate, this is less of an issue than in drier environments.

Size matters more in paludariums than in standard aquariums because you are dividing the volume between land and water. A 60cm tank that seems spacious as an aquarium can feel cramped as a paludarium. For a first project, consider a tank of at least 45 x 30 x 45cm (length x depth x height).

Building the Land Section

The land section is the structural core of your paludarium. Several methods are commonly used:

Expanding Foam and Silicone

Expanding polyurethane foam (available from hardware stores) is the most popular method for building land features. Spray the foam onto the back and side glass to create the shape of your land area, let it cure for 24 hours, then carve it with a knife to refine the shape. Coat the carved foam with aquarium-safe silicone and press coco fibre, peat or cork bark into the surface for a natural texture. Multiple coats of silicone ensure the foam is fully sealed.

Cork Bark

Cork bark panels and tubes provide a natural, ready-made surface for the land section. They are lightweight, rot-resistant and have a textured surface that mosses and epiphytes attach to readily. Cork bark can be siliconed directly to the glass or attached to an expanding foam base for additional dimension.

Egg Crate and Hygrolon

Plastic egg crate (light diffuser grid) serves as an excellent structural framework for the land section. It is lightweight, easy to cut and shape, and allows water to flow through freely. Cover the egg crate with Hygrolon — a synthetic wicking fabric that draws water upward by capillary action, keeping the land section moist without waterlogging. This is particularly effective for growing mosses and ferns on vertical surfaces.

Drainage Layer

Beneath the soil or planting substrate on the land section, include a drainage layer of LECA (lightweight expanded clay aggregate), gravel or plastic drainage cells. This prevents the land substrate from becoming waterlogged, which causes root rot in terrestrial plants. A layer of mesh or landscape fabric between the drainage layer and the soil prevents soil from washing down into the drainage.

Waterfall and Drip Wall Features

Moving water is one of the most attractive features of a paludarium. Options include:

Waterfall: Use a small submersible pump (300-600 litres per hour is usually sufficient) to push water from the aquatic section up to the top of the land section, where it cascades down over rocks, cork bark or carved foam. The waterfall keeps the land section moist, aerates the water below and creates soothing sound.
Drip wall: A perforated PVC pipe or drip tray at the top of the back wall distributes water evenly across the entire back panel, creating a thin film of water that flows over mosses, ferns and epiphytes. This is extremely effective for growing tropical mosses and creates a lush, green back wall.
Stream or rivulet: For larger paludariums, you can create a meandering stream across the land section that flows into the water below. Use silicone-sealed foam or resin channels to guide the water.

When designing water features, plan the plumbing carefully. Ensure the pump is accessible for maintenance and that the flow rate is adjustable. Too much flow creates erosion; too little allows stagnation.

Plant Selection for Paludariums

Plant selection is where paludariums truly shine. You can use three categories of plants:

Emersed Aquatic Plants

Many popular aquarium plants grow beautifully above the waterline. Anubias, Bucephalandra, Java fern, Cryptocoryne and Staurogyne repens all thrive in the moist transition zone where land meets water. When grown emersed, these plants often develop different, more robust leaf forms and may even flower.

Terrestrial Tropical Plants

Pothos (Epipremnum aureum): Virtually indestructible, grows rapidly, tolerates low light, and roots absorb nitrates from the water below.
Ferns: Maidenhair fern, bird’s nest fern and asplenium species love the humid conditions of a paludarium. They do well on the land section with consistent moisture.
Mosses: Tropical mosses (Taxiphyllum, Vesicularia) grow lushly on moist surfaces, cork bark and Hygrolon. In Singapore’s humidity, moss establishment is faster than in drier climates.
Bromeliads: Small species like Neoregelia and Tillandsia add colour and structural interest to the upper land section. They tolerate the high humidity well.
Selaginella: Spike mosses that create a carpet-like ground cover on the land section. They thrive in the warm, humid conditions of a Singapore paludarium.

Aquatic Plants (Below Water)

The submerged section can be planted exactly like a standard planted aquarium — use whatever species suit your lighting and CO2 setup. Low-tech choices like Java moss, Anubias nana and Cryptocoryne wendtii work well without CO2 injection.

Lighting Requirements

Paludariums require more thoughtful lighting than standard aquariums because you need to illuminate both the land and water sections effectively:

Full-spectrum LED: Choose a light with a broad spectrum (5000-7000K) that supports both terrestrial and aquatic plant growth. Many aquarium LED units work well when mounted higher above the tank to spread light across both sections.
Height adjustment: Suspend the light above the tank rather than resting it on the rim. This provides better coverage and prevents the terrestrial plants from growing into the light and burning.
Photoperiod: Eight to ten hours of light per day suits most paludarium plants. Use a timer for consistency.

Misting Systems and Humidity

In Singapore, ambient humidity is already high (70-90 per cent), which means you may need less supplemental misting than hobbyists in drier countries. However, if your paludarium is in an air-conditioned room, the humidity drops significantly and a misting system becomes valuable.

Manual misting: A simple spray bottle used once or twice daily is sufficient for small paludariums in non-air-conditioned rooms.
Automatic misting systems: Timer-controlled misting systems (MistKing, Exo Terra Monsoon) deliver consistent humidity at set intervals. These are worthwhile for larger setups or air-conditioned environments where humidity drops below 60 per cent.
Ultrasonic foggers: These create a dramatic fog effect but do not provide as much actual moisture to plants as misting systems. They are more aesthetic than functional.

Livestock Options

Paludariums can house both aquatic and terrestrial animals, though many hobbyists choose a plants-only approach:

Aquatic Section

Small, peaceful fish: neon tetras, ember tetras, endlers, Boraras species
Shrimp: Neocaridina (cherry shrimp) and Caridina species
Snails: nerite snails, ramshorn snails

Land Section

Dart frogs (Dendrobatidae): colourful, active and fascinating — but require fruit flies as food and a fully sealed enclosure
Crested geckos: arboreal, docile and well-suited to tropical paludariums
Vampire crabs (Geosesarma): semi-terrestrial crabs that use both land and water sections
Plants only: many hobbyists keep paludariums purely as planted displays, avoiding the additional complexity of terrestrial animals

If you choose to keep terrestrial animals, ensure the enclosure is escape-proof (sealed lid with ventilation) and that the animals’ requirements are fully met. Research each species thoroughly before purchase.

Maintenance Guide

Paludarium maintenance combines aquarium and terrarium care routines:

Water changes: Perform 20-30 per cent water changes on the aquatic section weekly, just as you would with a standard aquarium. Treat replacement water with a conditioner that neutralises chloramine (PUB water treatment).
Pruning: Terrestrial plants grow quickly in the warm, humid conditions. Trim regularly to prevent overgrowth that blocks light to lower plants and the aquatic section.
Pump and filter maintenance: Clean the waterfall pump intake monthly to prevent clogging from debris and biofilm.
Mould prevention: In very humid conditions, white mould can develop on wood and dead plant matter. Remove decaying material promptly and ensure adequate ventilation. Springtails (tiny beneficial insects) can be introduced to the land section to consume mould and decaying plant matter.
Top off evaporation: Even in humid Singapore, evaporation occurs. Top off with distilled or treated water as needed to maintain the water level.

For more inspiration and guidance on semi-aquatic setups, explore our paludarium and terrarium guide. Visit Gensou at 5 Everton Park to see paludarium setups in person and discuss your project with our team. With over 20 years in the aquascaping craft, we can help you plan a paludarium that thrives in Singapore’s unique conditions. Our Java moss guide covers one of the most versatile plants for paludarium use.

Frequently Asked Questions

Is Singapore’s climate good for paludariums?

Singapore’s climate is excellent for paludariums. The warm ambient temperature (28-32 degrees Celsius) and high humidity (70-90 per cent) closely match the tropical conditions that most paludarium plants and animals require. You may not need a heater for the water section or a misting system if the paludarium is in a non-air-conditioned room.

Can I convert an existing aquarium into a paludarium?

Yes, any aquarium can be partially drained and converted into a paludarium. Lower the water level to create space for a land section built from expanding foam, cork bark or egg crate. The main limitation is height — standard aquariums designed for full submersion may not provide enough vertical space above the waterline for a substantial land area.

How do I prevent mosquitoes from breeding in my paludarium?

Mosquito breeding is a legitimate concern in Singapore, where NEA (National Environment Agency) actively enforces anti-mosquito regulations. Keep fish in the aquatic section — they will eat any mosquito larvae. Ensure water features have constant circulation (stagnant water is where mosquitoes breed). If you have small, isolated water pockets on the land section, add a few drops of BTI (Bacillus thuringiensis israelensis) mosquito dunks, which are safe for plants and animals but kill mosquito larvae.

Do I need CO2 injection for a paludarium?

CO2 injection is optional and depends on your goals for the aquatic section. If you want a lush underwater planted tank below the land section, CO2 injection helps significantly. However, many paludariums use low-tech aquatic plants (Java fern, Anubias, mosses) that grow well without injected CO2. The terrestrial plants above the waterline do not benefit from dissolved CO2 — they obtain carbon dioxide directly from the air.

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