[leebca]

There are several possibilities here. But you have not provided enough information for determining the most likely problem. We need to know:

1. All about your marine system (size, setup, equipment, total volume, etc.)
2. The fish, their size, and other marine life in your system (by scientific name if you can) before this addition.
3. The kind of and sizes of the fish you added (by scientific name, if you can).
4. I wold like to know current actual test results for the following: ammonia, nitrite, alkalinity, calcium, magnesium, pH, temperature (range is okay), specific gravity.
5. Lastly, tell us how long the system has been up and running. When did it finish its cycle? Do you have any nuisance algae, microbes, red algae, etc.?

You obviously don't use a quarantine process and I would recommend you stop adding fishes directly to your marine system. As you can see, it can lead to harming those marine lifeforms already there. Get into setting up for that in the future. This is good info on that: A Fish Quarantine Process - Step by Step

Lastly, I don't recommend drip acclimation for marine fish under your circumstances. If you obtained the fish from your LFS and they were in the bag for under a couple of hours, drip acclimation is too slow and unnecessary. The usual water adds and dump is the way to acclimate such fish. It is faster, effective, and more than adequate.