Nitrite will just not leave me. I have done alot of water changes recently, including a 50% water change 2 days ago and a 40% one yesterday. Yesterday, it was at 0.2. Today it's at 0.8! Why is it rising? I am so frustrated I want to break things, and it's been rising all month. What if I do a 75% change, will that kill it? Or what do I do! Help, this is incredibly annoying and angerring.