see your other thread. jsut answered this over there for ya, you dont use anything to remove ammonia, thats what the bacteria are for, which develop during the cycle.
edit: here is the answer i gave in the other thread:
remove ammonia... that's what the cycle is for. the ammonia is removed by the natural bacteria that grows in the tank..
short verison:
ammonia enters tank through fish waste, decaying food, etc..
bacteria grow which feed on the ammonia. they expel nitrIte as waste.
new bacteria grow which feed on the nitrIte. they expel nitrAte as waste.
new bacteria grow which feed on the nitrAte. they expel nirtrogen as waste.
this is why the cycle is so important, it gives ALL the bacteria a chance to develope. once they are there, the cycel is never ending. from ammonia to nitrogen. ammonia is ALWAYS introduced by fish waste, decaying food and what not, and feeds the cycle.
i'm not sure what the ammo rocks do to salt water. i just know that every one i have ever seen clearly says not for use on saltwater. which leads me to belive it has something to do with the salt.
perhaps the salt confuses the rock, and it doesnt absorbe the ammonia. or perhaps it also pulls the salt out of the water. not sure exaclty, i jsut know you dont do it.
i'll see if i can find anything about it for ya. in the meantime, i would simply pull them out, and do another water change, as you should do one daily for a while. normally you wouldnt do them daily, but since you added livestock so soon, i think it's gonna be necessary to save any other livestock.