The so-called salinity is the weight percentage of all inorganic salts present in 1 kg of water.

If you're setting up an aquarium tank for your tropical fish, you may be wondering which substrate to use - calcium sand or coral sand. Both types of sand have their advantages and disadvantages, so it's important to compare them before making a decision.

The hardness of natural seawater is mostly maintained at 7-9dH. In the aquarium, the hardness of seawater should be controlled at 7-9dH.

This is a paradise for marine fish and aquatic animals.

Salinity is extremely important for marine ornamental fish.

Reef aquariums are a popular way to bring a piece of the ocean into your home. One of the most beautiful and fascinating inhabitants of these tanks are the corals. However, not all corals are the same, and some require special care and attention. Cartilaginous corals, also known as soft corals, are one such group that needs specific feeding considerations.

As long as the hardness of seawater is stable at 7'-9'dH, the pH value of seawater will be correspondingly stable between 8.0-8.5.