Hello, this is my first post. I would like to explain what I have done so far so please bare with me. I have a 20 gal freshwater tank that is 6 weeks old. I added fish in a week after starting not realizing the cycle process that is necessary. I lost 1 honey gourami this past Sunday so I brought a water sample to the lps and my Nitrate, Nitrite and hardwater was off the chart. I started doing DWC and I think I have been overfeeding. The LPS suggested adding prime for the nitrites. My question is I am already using API stress coat, should I be using both? As of today the water sample is reading ammonia .5, nitrate 20 ppm, nitrite off the chart, ph 6.2. I am wondering if I am at the end of cycling or I need to start from the beginning. ALso I am using testing strips but will go and get the liquid test kit since reading the forums. I am using well water which is softened. I do have RO also and I started using 50/50 RO/Well. The temp of the in the tank is consistently at 76. Also should I worry about the hardwater? Thank you . I am really enjoying my new finned friends and really want to do this right.