Question

which liquid or gas make water black and kill fish​

Answer 1

Answer:

Many, but not all, fish kills in the summer result from low concentrations of dissolved oxygen in the water. Fish, like all other complex life forms, need oxygen to survive. They get theirs in the form of oxygen gas dissolved in the water. That's why it's important to have an aeration device, a bubbler, in your home aquarium.

Warm water holds less dissolved oxygen than cold water, so summer is the time when fish can have a hard time getting enough oxygen. Other organisms use oxygen, too, including the algae that grow in the summer and bacteria that degrade organic matter. During the day, the algae produce oxygen through photosynthesis, but at night, when photosynthesis stops, they and other organisms keep respiring, using up oxygen.

Answer 2

Answer:

many , but not all , fish kills in the summer result from low concentration of dissolved oxygen in the water . Fish , like all other complex life form , need oxygen to survive . the gate theirs in the form of Oxygen gas dissolved in the water .