A mini pond brings life and a special flair to your balcony, terrace, or garden. For this small water paradise to thrive, some basic considerations are important during its creation.

1. Choosing a location

The right location is crucial for the balance in your mini pond. Too much sun promotes algae growth and causes water to evaporate quickly. An ideal spot is semi-shady with about six hours of sunlight per day.

The ground should be level so that the water is evenly distributed. If the ground has a slope, this can be compensated for with wooden wedges or stone slabs.

2. Materials and preparation

The following materials are needed:

• Container for the mini pond (e.g., mortar tub, wine barrel, or plastic tub)
• Planting baskets
• Pond substrate
• Gravel (preferably washed beforehand to avoid turbidity)
• Stones for creating different depth zones
• Aquatic plants

Before filling the container with water, it should be thoroughly cleaned.

3. Design and planting

Aquatic plants are not only decorative but also contribute to water quality. They remove excess nutrients, enrich the water with oxygen, and reduce algae growth.

Planting zones in a mini pond

To provide optimal conditions for plants, different depth zones should be created. This can be done by placing paving stones or bricks underneath. Generally, a mini pond requires:

• A marsh zone (up to 10 cm water depth)
• A deeper zone (from 20 cm water depth)

Suitable plants for the marsh zone

• Marsh Marigold: One of the first plants to bloom in the year.
• Forget-me-not: Blooms from May to September and also thrives in shallow bowls.
• Water Mint: Grows up to 60 cm tall, vigorous, and has a pleasant fragrance. The purple flowers are edible.
• Dwarf Cattail: A winter-hardy, easy-care plant that grows up to 70 cm tall.

Aquatic plants for 20 cm water depth and more

• Dwarf Water Lily: Loves sunny locations and provides natural shading for the water surface.
• Floating Plants:
  • Duckweed: Quickly covers the surface, draws nutrients from the water, and reduces algae growth. Easily thinned out.
  • Frogbit: Winter-hardy, forms beautiful floating leaves and small white flowers. Removes excess nutrients from the water and contributes to water purification.

4. Care and water quality

Mini ponds require regular care to maintain their balance:

• Refilling water: Especially in summer, a lot of water evaporates, so regular refilling is important.
• Oxygen enrichment: A small water feature improves oxygen supply for a pleasant atmosphere.
• Plant care: Occasionally thin out fast-growing plants like water mint.

5. Fish in mini ponds? What you should consider.

Only small fish should be kept in small containers such as pots or mortar tubs. These find food in mosquito larvae and other natural sources. However, one motto is: Less is more. Too many fish mean food scarcity and stress.

• Even small fish species need enough swimming space.
• In winter, a frozen mini pond would mean certain death for the fish. Therefore, fish from above-ground containers must be returned to the aquarium in good time. Only native fish species can overwinter in permanently installed mini ponds.

If you have an aquarium, you can place warm-water fish like guppies or medakas in the mini pond during the summer months. Since the water heats up considerably in summer, tropical fish species feel particularly at home. In open water, they often grow stronger and develop more intense colors. However, they should return to the aquarium at the beginning of the colder season – their vibrant colors will show best there.

6. Tips for clear water quality

• Wash stones and gravel beforehand so that the water remains clear from the start.
• Cover planting baskets with gravel to prevent the substrate from washing out.
• Do not place the mini pond in direct sunlight to avoid excessive algae formation and evaporation.

With these tips, setting up a mini pond should be successful, providing a beautiful, natural water element with low maintenance.