Preformed ponds
UBBINK® offers the widest selection of preformed ponds on the market. They are made in three types of material:
✓ polyethylene by a stamping process.
✓ high density polyethylene by a rotational moulding process.
✓ polyester by a contact moulding process based on a polyester catalysed resin.
The pond shapes vary greatly: some are strictly geometric, others have natural forms with banks, marshy areas and planting levels at different depths. With more than 40 years of experience, all preformed polyethylene ponds are TÜV certified. This is why UBBINK® can unhesitatingly offer a 10 or 15-year guarantee for preformed ponds.
The steps for installing a preformed pond
1 - Choosing the right location
The most appropriate location to promote the biological balance of the pond has a maximum of 6 hours of sunlight in a semi-shaded area, with the presence of few trees to prevent the water from being loaded with leaves and other nutrients.
2 - Mark out the shape of the pond on the ground
Place the preformed pool in the desired location and mark the contours of the pool with, for example, wooden stakes. Indicate on the ground the deeper inner areas.
4 - Position the preformed pond
The first step in the positioning of the preformed pond in the hole is to check that the dimensions are satisfactory. With a spirit level, make any adjustments necessary for a level installation. Finally, fill the pond with water to ¼ of its depth to prevent the preformed pool from moving during filling.
5 - Slurry with sand
After the pond has been partially filled, the cavities around the pond must be filled with sand. Here, it is helpful to first carefully fill in the sand all around and then gradually slurry it in evenly with a garden hose and plenty of water. This is the only way to ensure that the sand settles into even the smallest cavities and prevents the pond from sin- king. The sand should settle in between and the water should seep away. If necessary, repeat the process and fill the pond completely.
3 - Excavate and cover the bottom with sand
First dig out the deepest part, then shape the different areas and finally the edge of the pond. The hole should be about 10 to 15 cm wider and deeper than the actual size of the pond. It is vital to remove any stones and roots from the hole thus formed and to put a bed of about 10 cm of sand on the bottom. Pack down tightly to create a flat and stable bottom.
6 - Plant and decorate the surroundings
Water plants can be installed as soon as the pond has been filled. You can also plant up the edges of the pond with shoreline and rockery plants. However, fish should not be introduced before at least a month.