I started out my tank all wrong without getting it started. I given my fish to my local lfs. All I kept is my pleco because they couldn't take him and I have not found a home for him. When they tested the water they found that the ammonia levels are extremely high, a little nitrite, and a high pH. They then gave me a chemical called Prime that is supposed to make tap water safe as well as controlling the ammonia, nitrite, nitrate, and pH levels. I have changed 25% of my water and added this Prime twice, and my water is not getting any better. What am I doing wrong, and how can I get my tank successfully cycling so I do not hurt this pleco, and can safely add more fish and plants? Need help badly. 