Just as we must care for and take into account the temperature and pH of our aquarium, to keep our fish and other living beings in perfect conditions, it is also essential to pay close attention to the hardness and density of waterThis aspect is key to a healthy and functional aquatic environment, allowing fish to live in harmony with their natural habitat.
What is aquarium water hardness?
La hardness of water It refers to the amount of dissolved minerals it contains, particularly calcium and magnesium. It is classified into two main types: GH (general hardness) and KH (temporary hardness or buffering capacity). Both are crucial parameters to monitor in order to maintain the balance of the aquarium ecosystem.
What is GH?
GH, or general hardness, measures the total concentration of calcium and magnesium salts in the water. This parameter directly affects the health of the fish, as it influences processes such as osmoregulation, which allows the fish to maintain an adequate balance of salts and fluids in their bodies. In general, a low GH indicates soft water with few minerals, while a high GH indicates hard water with a higher amount of minerals.
What is KH?
KH, on the other hand, is linked to the water's ability to withstand pH fluctuations. This is especially important for preventing abrupt changes in the acidity or alkalinity of the water, which could be harmful to the aquarium inhabitants. A balanced KH helps maintain pH levels stable, providing a safer and healthier environment.
How to change water hardness
- To reduce water hardness: The most effective method is the use of reverse osmosis devices. These devices remove dissolved salts and minerals, producing softer water. They can also be used ion exchange resins or distilled water mixed with tap water.
- To increase water hardness: If the water is excessively soft, the addition of products that increase GH (such as specific mineral salts for aquariums) can balance the levels. Certain types of limestone rocks or seashells can also be used as decoration in the aquarium.
Water density: what is it and why is it important?
Many times, the water density Salinity and salinity can be confused with water hardness, but it is important to understand that they are different concepts. Density measures the amount of salt dissolved in the water. This parameter is especially relevant for marine and brackish aquariums.
Measuring water density
To measure water density, saltwater aquariums often use devices such as flotation densitometers or refractometers. These devices provide accurate readings and allow levels to be adjusted to suit the needs of the habitat.
What about density in freshwater aquariums?
In freshwater aquariums, salinity is almost non-existent, so measuring the water density It is not necessary. However, in brackish aquariums, where the mixture of fresh and salt water is essential, it is crucial to maintain strict control of salinity levels to ensure the health of fish and plants.
How to manage water quality in your aquarium
To maintain an aquarium in optimal conditions, you have to pay attention to different factors besides the hardness and density of the water. These include: use of water clarifiers, correct filtration and performance of nitrogen cycles.
- Aquarium cycling: This process allows the beneficial bacteria develop in the filter, guaranteeing an active nitrogen cycle that eliminates toxic compounds such as ammonia and nitrite.
- Periodic water changes: Changing a percentage of the aquarium water regularly is essential to dilute and remove waste buildup.
- Constant monitoring: Frequent measurement of parameters such as GH, KH, pH and nitrites ensures that the water remains at levels suitable for aquatic life.
We must not forget that each species of fish has specific needs in terms of water parameters. In this way, adapting the environment to its requirements is essential for its well-being and longevity. If you are just starting out in this exciting world, we suggest you read the Beginner's Guide to Aquariums.
Understanding and controlling the water hardness and density in an aquarium is a fundamental step to ensure the health and longevity of your fish. These parameters not only affect the water quality, but also the behavior, reproduction and resistance to diseases of its inhabitants. Its correct management ensures a balanced and suitable environment, making it closer to the natural habitat of the species that inhabit it.