Abstract
This article describes the impact of external environmental factors on the growth and development of aquarium fish, literature information on the physical and chemical properties of water. Low water temperatures have a negative effect on fish, causing peripheral blood vessel constriction, decreased breathing, and glycolysis as a result of impaired substance metabolism, and then the development of autolysis processinig, as well as the death of fish slowly.
Keywords
aquarium
fish
physico-chemical properties of water
gas in water
salt
thermal conditions
oxygen
toxicity
ph.