Hello FHM and Wilder. Just thought I would give you a quick update. As of yesterday I added some tap water and kept the ammonia removal pellets in the tank as well as adjusting the inlet water hose to give a bit more air. I lost one more fish this morning but this evening the tank seems a lot more settled. What I have left are swimming nicely around the tank, in and out and around the plants and shoaling well. I have not tested the water today but will do so tomorrow and will report back. Once again thank you both so much for your input yesterday.