Basic understanding about Ammonia

In aquatic environment Ammonia is present in the form of Ammonium which predominates over nitrate in an acidic environment, and there is always a chance that nitrates will be converted to ammonium. Plants can absorb both forms of nitrogen.

Regulation of ammonia in a planted tank

Any alkaline species would do that; carbonates play a significant role in ammonia regulation. In order to help with ammonia regulation, it is necessary to monitor GH and kH as well
Chances of ammonia spike will be high with low GH and KH (use products like GH recharge and KH boost)

There is a difference between ammonia regulation and neutralization. There are products available to neutralize Ammonia and chloramines.
Major drawback is that it eliminates Nitrates and dissolved oxygen..