So, I learned the hard way how stressful it is for fish to do a cycling process. I had half my tank die in the first couple weeks and I had to humanely euthanize the rest with vodka and water because they were barely alive and were changing colors. So, now the tank is empty, ammonia is reading zero and the nitrites are reading 2.0 ppm. The nitrates are around 10 ppm, which is normal for my area. I dropped in some food to allow it to decay to continue feeding the nitrifying bacteria and now I'm wondering if all I do is wait or if I need to do water changes. Of course I know to do a 50% water change once the readings are zero, but am I missing anything else? Please help, I'm super upset with myself right now because i fully stocked my tank without reading about the nitrogen cycle.... Am I doing this properly? I appreciate any and all help. Thanks so much. Joe Edit: Oh, and how often do I need to feed the empty tank? Thanks!