If you do another ammonia test, place the tube on top of the card (or hold it up against the white background) before taking the photo. I agree that, once a tank has been cycling, a reduction in ammonia to a color between 0 and .25 using the API test can be considered to be zero, but it's hard to tell what color yours currently is.
Once you have a reading of 0 - .25 ammonia, you can do a final ammonia challenge by adding enough to bring the tank to 2ppm and then test 24 hours later... If it's back down to 0-.25, the tank is definitely cycled.