false read. post a full tank shot, fish and corals will prove why that was a false read.
ammonia cannot spike in a reef tank unless several fish die at once. not even a single fish will spike it (we have accurate measures from seneye on fish loss threads tracking ammonia to the thousandths, that's where it stays in post-cycle reefs)
in your full tank shot, the fish have to be hovering at the top, the water cloudy, and some deaths have to have taken place for the reading to be accurate. there is no time a true large ammonia spike is inconsequential, and we can see that consequence clearly without test kits. k post a full tank shot of the system currently.
_per red sea and api, most running reef tanks will show .25-.2 ammonia at all times, and only the rare kits show hard zero, so your testing is not out of line with all of reefing.
you can cease adding ammonia binders, they cause false reads too.
No need to buy bottle bac as well, the spike never happened if just a test kit said it, and not the entire tank.