If you want your reef to work correctly apply the fix where it's needed and clean up the system, disallow the algae and clouding from waste in the rocks and sand, those produce irritating waste acids and detritus clogs up your system although it doesn't cause free ammonia.
Cease testing for ammonia for the life of the tank, it can't drift out of spec.
Reefing isn't very fun using the old cycle rules is it- from those rules we get concern, doubt, untimeliness, hesitation vs absolute resolve posted for you to consider using the new rules. The reason your post is a cycle issue is because on a cycling chart ammonia never goes back up and holds, after a cycle.
Old cycling rules got you to spend money to test a param we already know is fine.
New cycling rules save you money
Old cycling rules disavow surface area mechanics, no matter how many times it's mentioned. Old cycling rules accept test readings as right no matter what, even if Google shows twenty years of misreads for the same kit