Hey Mike, welcome to AA!
What's your ammonia reading? And what test kit are you using? If you're using a test strip kit you may be getting inaccurate readings; that might be the problem. Otherwise, you added too much ammonia.
Try doing a 50% water change and then see where your ammonia is. If it's still off the charts, or above 4ppm, do another 50% water change and check again. Keep doing that until your ammonia is between 2 and 4 ppm
You shouldn't need to add 8mL of ammonia per day. The goal is to add as much ammonia as you need to in order to keep it between 2 and 4 ppm
. If the ammonia is already in that range, you don't need to add anything. When the bacteria starts to grow and the ammonia starts to drop, that's when you need to add some more, and then you just keep adding it until around 2ppm of ammonia is completely converted to nitrate in 24 hours. At that point, do a water change to get your nitrate into acceptable levels and then you're all set!