I bought every thing new from big al Edmonton store. I am using Marineland Pengiun power filter 50 to 70 gal (with two bio wheels). There is no bacteria built up what so ever on the bio wheels. A couple of times I have seen 0.5 ppm of ammonia. One thing I did was, I did not add the quick start in the beginning, I added it after 3 weeks. Can you guys advice me what should I do at this point in time? I have 4 electric yellows , 2 electric blues, 2 snow whites, 2 red zebras and 2 frontosas in the tank. Should I just keep adding the prime water conditioner to the tank until the ammonia test turn yellow ??? I also took the water to big al for testing and same results. Nitrite and Nitrate never go above 0.