The tank wasn't cycled properly and ammonia is now going to spike. How high remains to be seen.
What I would suggest at this point is immediately start making replacement water for the tank. Get yourself a trashcan, plastic tub, or something else of that variety and make up a whole bunch of saltwater. Stick a powerhead in it to aerate and mix it and a heater to bring it up to tank temperature. Make sure specific gravity of the new water matches the tank as well.
Then start measuring ammonia twice a day. If the tank goes over 1 ppm, then replace enough of the water to bring it down to 1 ppm ammonia. For example if it goes to 2 ppm you are going to need to replace half the water to get things back to 1 ppm. As long as you stay below that number, your fish and the critters in your live rock will probably make it. Don't bring it down much below that number or you will just prolong the cycle. The beneficial bacteria need ammonia to get going.
More than likely, you will be making a lot of water changes the next couple of days and some of those water changes may be massive. You have to have the water ready ahead of time. Once the ammonia comes down to near zero and stays down you are basically out of the woods. The nitrite levels will still be going up but the nitrite is not particularly toxic in saltwater tanks.
You had better feed the fish very lightly until the ammonia comes back down to zero.
Anyway, all is not lost but you NEED to be able to make those big water changes.
How bad this is going to be is going to depend on how high the ammonia spiked originally before you added the fish - in other words, how robust a cycle you originally had in the tank.
What I would suggest at this point is immediately start making replacement water for the tank. Get yourself a trashcan, plastic tub, or something else of that variety and make up a whole bunch of saltwater. Stick a powerhead in it to aerate and mix it and a heater to bring it up to tank temperature. Make sure specific gravity of the new water matches the tank as well.
Then start measuring ammonia twice a day. If the tank goes over 1 ppm, then replace enough of the water to bring it down to 1 ppm ammonia. For example if it goes to 2 ppm you are going to need to replace half the water to get things back to 1 ppm. As long as you stay below that number, your fish and the critters in your live rock will probably make it. Don't bring it down much below that number or you will just prolong the cycle. The beneficial bacteria need ammonia to get going.
More than likely, you will be making a lot of water changes the next couple of days and some of those water changes may be massive. You have to have the water ready ahead of time. Once the ammonia comes down to near zero and stays down you are basically out of the woods. The nitrite levels will still be going up but the nitrite is not particularly toxic in saltwater tanks.
You had better feed the fish very lightly until the ammonia comes back down to zero.
Anyway, all is not lost but you NEED to be able to make those big water changes.
How bad this is going to be is going to depend on how high the ammonia spiked originally before you added the fish - in other words, how robust a cycle you originally had in the tank.