When to add salt in fish tank?

Here's why:

* Freshwater fish are not adapted to saltwater: They have evolved to live in environments with low salt levels. Adding salt will disrupt their natural balance and can lead to health problems.

* Salt toxicity: High levels of salt can damage fish gills, kidneys, and other organs. It can also disrupt their osmotic balance, making it difficult for them to regulate their body fluids.

* Changes in water parameters: Adding salt can change the pH and hardness of the water, which can be harmful to freshwater fish.

However, there are some exceptions:

* Specific fish species: Certain freshwater fish species, such as African cichlids from Lake Malawi or Tanganyika, are known to tolerate a slightly higher salinity.

* Treating specific conditions: In some cases, a veterinarian may recommend adding a small amount of salt to a freshwater tank to treat a specific condition, such as fin rot or parasites.

Always consult with a qualified veterinarian or fish expert before adding salt to your freshwater aquarium.

If you have a saltwater aquarium, it's important to add the correct amount of salt to maintain the proper salinity. Always use a high-quality marine salt mix and follow the manufacturer's instructions carefully.