The tap water always contains Chlorine and other gases to make water drinkable. But using same tap or RO or Aquaguard water for Fish tank is not suggested. That bad element can cause to stress fungus and stomach problems.
To prevent with this we need water conditioner which remove all gases and chlorine from the water. Ocean Free Anti Chlorine Special work best water conditioner. Use this after every water change. Ocean Free Anti Chlorine Special is safe and easy to use.
Ocean Free Anti Chlorine Special is also prevent Stress and bad bacteria too.
Buy Ocean Free Anti Chlorine Special