SeaChem
"Since both Nessler and salicylate tests are
run at a pH of greater than 12, they measure as
ammonia any substance which can generate ammonia
or primary amine groups at high pH, including ammonia com-
plexed to ammonia removing conditioners. The salicylate tests
rely on the reaction of ammonia with hypochlorite or chlorine,
and, consequently, any aquarium product capable of removing
chlorine (dechlorinators and bisulfite based ammonia condition-
ers) can be expected to interfere with color development, even
when ammonia is present."
Your testing results are different than your ammonia alert badge correct? And you have rock in the tank that was exposed to tap water treatment chemicals and potentially chloramine correct? It's possible that you're running yourself in a circle here, and it's also possible that your tap water had high levels of chloramine and you didn't treat it with enough conditioner. That rock that you're worried about could be leaching all kinds of stuff into the water. Simply rinsing it off isn't going to be good enough, and you should pick up a total and free chlorine test to rule out chloramine being leached into the water from those rocks. The test you showed earlier was only for free chlorine. Homedepot and lowes have total and free chlorine test strips.