Welcome to Fishlore.
It would be helpful if you could post actual readings for
ammonia,
nitrite,
nitrate, and
pH. Stocking with fish 2 weeks in seems awfully fast to me (I didn't add my first fish for over 2 months after my tank cycled). What temp do you keep your tank at? What kind of filter are you using? How much
live rock do you have, approximately? What is your
salinity/
specific gravity, and do you test it with a
hydrometer or
refractometer? How did you
acclimate the clownfish exactly? Did you just equalize the temp and drop it in? Are you using tap water or
RO/DI to mix your salt water? Did you get the other fish that died at the same pet store where you got your clown?
Sorry for all the questions, but the more info we have, the better chance we can help you figure out what is going on.
