I have had my tank up since 3/4/07. I put fish (3 zebra danios) in it on 3/6/07. As of 3/15/07 I had these levels: ph 8.2, nitrite 0, ammonia 1.0.
As of today (3/19/07), I am starting to get little reddish/brown spots on my plastic plants, my big rock, and the gravel on the bottom.
What is the...