Paludarium: A semi-aquatic paradise made with your own hands

Imagine a small corner of a tropical forest where tree branches hang down to the water's edge and amazing plants grow on the shore. This is not a dream, but a paludarium — a unique ecosystem that combines the underwater and above-water worlds in a single glass container.

Essentially, it is an aquarium, but not quite a typical one. A significant part of it is reserved for land or shallow water, where not only fish can live, but also amphibians, snails, or simply moisture-loving greenery. It is a living picture that you create with your own hands.

Creating such a semi-aquatic paradise at home is a fascinating and creative activity. It is easier than it might seem at first glance. The main thing is to understand the basic principles and approach the task with love. Let's figure out together where to start and how to avoid typical beginner mistakes.

Paludarium and other reservoirs

The paludarium has only three main “competitors”:

Riparium

An aquarium with land elements (in floating containers) and a relatively low water level is ideal for fish, underwater plants, and some above-water plants, but it is not suitable for reptiles and amphibians.

Terrarium

A container with soil and a small body of water, inhabited by reptiles, snakes, amphibians, and plants that are usually artificial or grow on driftwood or are resistant to trampling (ivy, ficus).

Aquarium

Completely filled with water, it is suitable for fish, amphibians, snails, and shrimp, and you can grow underwater species of moss and ferns, algae, and a number of flowering plants in it.

You can keep fish and shrimp as well as amphibians and snakes in a paludarium. Mosses and algae, as well as aquatic plants, thrive in it. All these advantages come at the price of great complexity in the care and maintenance of this aquaterrarium.).

	Paludarium	Aquarium	Terrarium	Riparium
Water	+	+	—	+
Soil	+	—	+	+ (a little)
Underwater plants	+	+	—
Aquatic plants	+	—	—
Fish and underwater inhabitants	+	+	—
Animals and aquatic inhabitants	+	—	+	—

What a paludarium consists of: layers

“Canopy”

This is the uppermost part of the paludarium, formed by the tops of terrestrial plants. It can be supplemented with vines and driftwood with epiphytes (plants that do not need soil). The purpose of the “canopy” is to shade the lower part of the tank and serve as a shelter for its inhabitants.

If you plan to settle reptiles and amphibians on top, equip them with bathing areas (in driftwood or a special container attached to the wall).

Land

The design of this layer will depend on the concept you wish to implement: tropical forest, waterfront, mangrove swamp, or turtle island. This will affect the size and height of the land, the amount of water, the types of plants and animals, and the layout of the transition zone (from land to water).

First, you need to install a divider between the water and the land. Here are a few ways to do this:

• Using a PVC shelf (“floating” option It is installed above the water and either glued to the walls of the tank or placed on a substrate or supports.
• Create a base from stones, sand, and wood (“island” The substrate will be laid on top.
• Use a plexiglass partition that will not let water through (“50/50” It can be attached with silicone or aquarium glue.

Then, drainage made of stones, a special mixture, or filter pads is placed on the base for the land. The top layer is the substrate. When choosing it, focus on the plants and inhabitants of the reservoir (most aquarium soils, as well as terrarium soils, are suitable).

The higher the layer of soil, the lower the humidity on it. Therefore, when populating a paludarium with amphibians and reptiles, make sure to create a full-fledged transition zone so that they can easily move from land to water.

Don't forget:

• hardscape elements (large stones, branches, and driftwood);
• waterfall (filter and several vertical surfaces for water to flow down);

• heating, humidity control, lighting, and filtration systems;
• decorations (caves and shelters, coconut houses, resin bridges).

Water

Everything here is like in an aquarium:).

• for fish and other aquatic inhabitants – the ability to add food to the water and make regular changes, heating, shelters.

• for plants). – substrate with a nutritious base, water filter, lighting.

There is no need for a CO2 supply system. In addition, carbon dioxide can negatively affect the health of frogs living in the aquaterrarium.

— H. van Bruggen Famous Dutch aquatic plant enthusiast

Plants for the paludarium

Vegetation for the tank is divided into three conditional types.

Underwater plants

When choosing plants, don't forget that the water level in a paludarium is much lower than in an aquarium. Long and actively growing specimens will quickly reach the surface and lose their appearance: the leaves will begin to shrink and the stems will stretch.

Lighting is also important. Plants on the ground can shade aquatic plants, especially if you also place duckweed in the paludarium.

Good options include:

• javanese, Christmas, and other types of moss;
• dwarf ferns (Leptocilus pteropus);
• salvinia, duckweed, and other plants floating on the surface;
• amazonian echinodorus and vallisneria – with caution (they can overgrow the water layer).

Not suitable:

• any vegetation that requires complex care and frequent trimming (inconvenient).
• anything that will be eaten by fish, shrimp, snails, and frogs.

Underwater and above-water plants

This includes most epiphytes. These plants can adapt to any environment, as long as there are no sudden changes (light, fertilizer, temperature). Otherwise, the leaves will begin to fall off or even “dissolve” (the infamous “cryptocoryne disease”).

Plants to avoid:

• carnivorous plants (bladderwort, butterwort) – they can feed on insects and small inhabitants of the paludarium;
• any plants that amphibians and reptiles eat.

Aquatic plants

Any vegetation that tolerates high humidity well and does not have too extensive a root system is suitable.

The following will look good:

• mosses;
• small orchids.
• vines and ivy;
• mini ficuses.
• eagle ferns.

Recommendations for “unsuitable” plants are the same as for underwater and above-water species: do not plant predators and “food.” However, if there are few small creatures in the tank (or they live underwater), sundews and butterworts are a good option.

Paludarium inhabitants

You can populate an aquaterrarium with a variety of creatures: from fish and shrimp to turtles and iguanas.

For water

Any small freshwater fish (guppies, mollies, danios, gouramis), shrimp (cherry, amano), snails (nerita), crayfish.

Recommendations: all species must tolerate the same level of lighting and water hardness; shelters are mandatory; do not allow overpopulation.

Land

Reptiles and amphibians that cannot swim (snakes, frogs, lizards).

Recommendations: the land area should be large to avoid contact with water; places for exploration.

Semi-aquatic creatures

Crabs (alluring), turtles (yellow-bellied), mudskippers, newts, axolotls, salamanders, frogs, and toads.

Recommendations: a good transition zone to water and high humidity; make sure that reptiles and amphibians do not eat fish and shrimp; large species require a large paludarium.

The main rule when populating a paludarium is species compatibility. All creatures must be able to coexist comfortably under the same conditions of lighting, temperature, and water hardness (in the case of fish). In addition, they must not injure or eat each other.

Ideas for a paludarium

The appearance, inhabitants, and vegetation of the entire aquaterrarium will depend on the environment you want to recreate in the paludarium.

Tropical forest

African jungle or thickets along the banks of the Amazon River. The most common type of paludarium. Bromeliads and orchids will look beautiful on land, and Javanese moss, anubias, and cryptocorynes will look beautiful in the water.

The tropics can be populated with frogs (tree frogs, tree climbers) and fish (angelfish, discus, danios, cardinals).

Seashore or lake shore

A distinctive feature is brackish rather than fresh water (12-15 dGH). The coastline can be easily imitated using sandy substrate, and seaweed can be imitated using vallisneria thickets. Japanese marimo moss would also be appropriate. You can populate your improvised seashore with attractive crabs, sea dogs, gobies, and small gobies.

Turtle island

One of the most difficult types of aquaterrariums, where it is better not to place invertebrates and fish (turtles will eat them). The substrate should be fine-grained and moist. Don't forget to add rocks and driftwood for the turtles to climb on and bask in the sun. Suitable plants include vines, ferns, and carnivorous plants (such as bladderworts).

Mangrove swamp

In nature, this is a body of water located under the roots of a mangrove tree (you can make an imitation of it from mopane driftwood). Miniature orchids and flowering epiphytes will help recreate a tropical swamp atmosphere. You can plant duckweed on the surface of the water and place Carolina waterweed nearby.

Red mangrove crabs, mudskippers, mollies, and spitterfish are suitable inhabitants.

Quick guide: how to make a paludarium

When recreating any type of biome (swamp, shore, or tropics), follow these steps in order:

1. Make the base: drainage and all water equipment (filters, etc.).
2. Arrange and secure the hardscape elements (rocks, branches, and large driftwood).
3. Add substrate.
4. Fill the water area and check that everything is fine (no leaks, soil erosion, flooding).
5. Plant all types of plants: from underwater to the uppermost above-water (vines, ivy).
6. Populate it with living creatures.

With the right combination of plants, animals, and fish, proper care, and patience, you will end up with a luxurious paludarium that combines the most unexpected elements of the land and underwater worlds.

A paludarium is not just an aquarium or a terrarium, but a cozy corner of nature where water smoothly transitions into land, and plants, animals, and moss create a living picture. It is the perfect choice for those who want to experience the spirit of the tropics or swamps right at home. Making a paludarium is not that difficult: you need a suitable container, a well-organized drainage system, the right soil, plants, and, if you want, small frogs or snails. The main thing is not to strive for perfection the first time around, but to enjoy the process of creating a living world with your own hands.

Questions and answers

Why has a strange coating appeared on the plants in the paludarium?

These are harmful algae: blue-green, “black beard,” etc. Reasons for their appearance: overexposure to light, excessive fertilization, too few plants.

What can I use to make a paludarium?

Any aquarium of sufficient size will do. The larger the inhabitants of your aquaterrarium, the larger the paludarium should be.

What should I do if mold appears on the walls?

Add plants to bare areas of soil in the water, or increase the water level. Install good ventilation so that humid air does not stagnate.

How to choose the right animals and plants?

Do not place together those that will eat each other. It is also necessary to take into account the environmental conditions: humidity, temperature, light level, water hardness. They should be more or less the same for all animals and plants in the paludarium.

How difficult is it to care for a paludarium?

It is more difficult than caring for an aquarium or terrarium. You need good ventilation and a high-quality water filter, careful water changes, and timely care for all inhabitants.

Creating a paludarium is an exciting journey that allows you to combine two elements in one living space. You are not just setting up an aquarium or planting plants in a pot, but creating a whole world where the humid tropics meet the water surface. This is a unique opportunity to express your imagination and care for nature.

Don't be afraid of the challenges. Start with a simple composition and choose undemanding plants and animals. The main thing is to understand the basic principles: proper lighting, humidity and temperature control. Over time, you will gain experience, and your semi-aquatic garden will grow and change with you.

A finished paludarium will be an amazing decoration for your home and a source of pride. It is a living, breathing picture that is interesting to watch every day. It will give you hours of relaxation and creativity, and its inhabitants will give you the joy of interacting with the amazing world of nature in your home.