So 2 make a long story short I was helping a friend with her tank who btw has stocking issues and doesnt practise good maintenance. I have expressed 2 her the many things I think she could change 2 better the life of her fish whom she made the choice to get...but she says "They r just fish." (Don't get me started on how I feel about that.) When she was doing a water change I asked if she dechlorinate the water..she said "I've never done that and my fish r fine." I was in absolute disbelief...i then made her go 2 my house 2 pick up some Prime.