The fascination of the underwater world
Many people dream of experiencing the beauty and diversity of a tropical coral reef at home.
Bring this dream to life
Modern aquarium and filtration systems, together with high-quality seawater, make it possible to enjoy a reef aquarium in your own home. hw Wiegandt offers products for preparing and maintaining suitable water conditions. Water quality is a central requirement for keeping a successful marine or reef aquarium.
hw marine salts / hw Marinemix
Consistent, checked quality you can rely on
hw marine salt mixes provide a basis for preparing high-purity seawater for marine and reef aquariums. Suitable water composition is an essential part of successful aquarium care.
We produce our marine salts at our own specialised manufacturing facility in Krefeld, Germany. Its design incorporates decades of experience in manufacturing marine and specialist salt mixes. All parts that contact the product are made from stainless steel or high-quality plastics of the kinds also used in aerospace applications.
Bioactive substances in hw Marinemix
Since the 1980s, hw Marinemix formulations have included organic substances of the kinds found in natural seawater. Here, the term “bio-elements” refers to bioactive organic substances such as enzymes, hormones and vitamins.
These substances are involved in metabolism, growth, cell renewal and reproduction, and support the care and breeding of marine animals, microorganisms and algae.
*Terminology according to the Brockhaus encyclopaedia.
Trace elements in hw Marinemix
hw Marinemix contains trace elements whose presence has been demonstrated in natural, unpolluted seawater. Advances in analytical equipment and measurement methods allow the composition of seawater to be examined more precisely.
Our formulation approach takes these findings into account. Elements that cannot be detected using modern methods are not deliberately included. We use a mixed-crystal process to distribute trace elements throughout the salt mixture.
Mineral salt mixes
Adjust water parameters with hw mineral salt mixes
Mineral consumption depends on the stocking level and the species kept in your aquarium. Reef-building organisms, including stony corals, can have a high demand for calcium, magnesium, strontium and carbonates when growth is strong.
In a mixed aquarium, regular water changes may compensate for a gradual decline in these parameters. In a reef aquarium densely stocked with growing stony corals, consumption can exceed the amount replenished through water changes alone.
What happens when minerals are depleted?
Mineral deficiencies can slow coral growth and affect growth forms. In severe cases, tissue damage or coral loss can occur.
Adding calcium chloride or magnesium chloride supplies the required mineral together with chloride. Repeated dosing without considering the other components of seawater can change their relative proportions. A balanced supplementation method therefore takes the overall ionic composition into account.
Sodium-chloride-free marine salt is used to balance the additional sodium chloride associated with this type of supplementation. Salinity must also be monitored and any increase adjusted carefully, taking aquarium volume into account. hw mineral salt mixes are designed to help replenish minerals while maintaining an appropriate ionic balance.
hw supplementary salts
hw supplementary salts provide a basis for replacing minerals consumed in your aquarium. Calcium, magnesium and components contributing to carbonate hardness are among those that may need regular replenishment.
A balanced supplementation system accounts for the other ions introduced with these salts. Sodium-chloride-free marine salt helps balance the additional sodium chloride, while any gradual rise in salinity must be monitored and adjusted through suitable water changes.
For a more convenient alternative, explore our hw mineral salt mixes. Follow the product-specific application and dosing instructions.
Marine aquarium care products
Support water quality and a diverse aquarium environment
Marine aquariums, especially reef aquariums, are artificial biotopes with a delicate biological balance. Consistent water quality and low pollutant levels are central to maintaining that balance.
hw Wiegandt water conditioners and care products help you maintain suitable conditions for marine animals. Our marine aquarium care range draws on more than 50 years of experience and is continually developed and improved.
hw specialist filter media for marine aquariums
Clear water helps an aquarium look its best, and effective filtration plays an essential part. Filtration must do more than capture suspended particles: it also needs to address dissolved organic and inorganic pollutants. Specially prepared, high-performance activated carbons and other specialist media are designed for these tasks.
For hw filter media, we select high-purity activated carbons together with mineral and semi-synthetic carrier materials. These are treated and combined to target particular pollutants. They complement conventional materials such as filter wool, fleece, foam, clay and ceramics by binding and neutralising dissolved pollutants, colourants and other unwanted substances that conventional media may not adequately remove.
All marine aquarium products
Looking for more marine products? Explore the full range in our product catalogue.
Information and tips for
marine and freshwater aquariums
UV-C radiation
Reverse osmosis
