HI Jimbo. I've just cycled a 30gal. saltwater tank That I thought a month ago was cycled so I purchased a Foxface. The tank refused to cooperate so the final cycle happened last week. Waited five days with perfect parameters and bought 3 blue/green Chromis. Well foxface wasn't happy and killed one. Today I removed Foxface from the tank and replaced him/her with 3 more Chromis making five altogether. Foxface is in a seperate tank and unfortunately will be returned to my lfs.