I filled up my 29gal last night and conditioned it with Prime. This morning I checked the pH was ~8.1 and Ammonia ~0.5. I thought it was kinda strange because I thought Prime was supposed to drop the ammonia to 0. Anyway, I read somewhere to add about two teaspoons of ammonia to start. I checked the ammonia and it was 8ppm+, so I did a 20% water change and Primed the water in the bucket first and let it sit for about 15 mins. When I checked the water about an hour later the ammonia was still showing 8ppm+. What should I do?