the filter bacteria are still ok, thankfully and cannot be killed by any upwelling event. once cycled, they stick and dont starve or die off in these events.
they're being out-upwelled by the exact material we specialize in removing above. its awesome when reef job requests come with pages of inspectable work outcomes~ saves $ by guessing. once you remove the material, the filter bac that remain work just fine.
also, your ammonia event resolved in fifteen minutes but not per the tester you are using (other compounds tbd in the column set them off as a perpetual free ammonia concern, but its used rapidly in all reefs)
if you had seneye then it would show resolved. our cleaning is for your upcoming algae nightmare, not in response to a misreading test kit.
this post isn't to be eternally jaded about api
its a result of studying all the collective seneye posts on this forum vs all search returns for stuck cycles, which are 100% not seneye posts. they're api and red sea, hence the constant doubt- I never accept initially any stated ammonia params, from any post. they're all dealing in kits that take a long time to show a rise or a downfall in nh3.
a rip clean is good for any reef, its why we dont even need pics of your setup to offer one. done logged em.