I'm new to the salt water thing, currently I have a 46 gallon bow face tank, with a cf300 filter, live sand , live rock and temp is sitting right around 77 . My ammonia is a little high but not much and everything else is where it should be chemical wise. The tropical fish store told me to put some damsels in there to test it out and they seemed fine but this morning only 1 of 3 survived the night. What could be my problem here? Could it be the slightly high ammonia? I was also told to get a wave pump as it will help with water getting to the appropriate level quicker and help with the fish life. Any suggestions appreciated.