Hello, I need some advice on how to lower the nitrite. My tank has been set-up for 3 weeks now. I have 2 platies and 1 guppy. Last week, I took a water sample to Petsmart and they said that the nitrite is too high that I have to do 25% water change every other day. I did the water change and have the water tested again and still pretty high. I decided to buy the API Master Test Kit so I can monitor the level myself. Yesterday, the readings are as follows: Ph - 7.6 Ammonia - .50 ppm Nitrite - 5.0 ppm Nitrate - 10 ppm I did some water change again after this reading. Today, I did some testing again and here are the results: Ph - 7.6 Ammonia - .50 ppm Nitrite - 5.0 ppm Nitrate - 5.0 ppm Are these numbers normal? Do I need to do the water change until the Ammonia and Nitrite go down to 0? Am I close to full cycling process? Is there any other things I can do to lower the nitrite? Based on what I have read, high nitrite is not good for the fish and I am worried that they will die. So far they seem okay. I appreciate any advice. Thanks.