Ammonia Spike?

[SpateD]

So I just recently transfered my tank from a 10 gallon to a 25 gallon. All the ammonia levels were fine, then after about an hour after the move, I checked water parameters again and the ammonia was around .3. Then I added 1.3 ml of Alpha by aquavitro to the water as directed on the bottle. Tested about 10 minutes later and it showed the ammonia down to about .18ish (still green).

What can I do to lower the ammonia level some more? A water change? Can I add more Alpha?