I think i stumped my LFS guy please need help

b wells

New member
The short story is I few months ago moved my 75 Gallon tank to a new 120. In that move I had a few clowns and cardinals and an eel, along with some anemones. The move went well I used my old sand and added 3 new bags along with the old water and new. Here comes the issue, I have add prime, along with Smart start and the fist round I add 3 small yellow tangs. They made it 3-4 days and all died around the same time. So wanted and tested for a week, test came out perfect so 3 more yellow tangs where added. 3-4 days later all 3 tangs dead again. waited another week tested and added a Ray and yellow tang and wrasse and the wrasse and ray are doing fine and the yellow tang died about a week later. so now still have the clowns, ray, eel and last night added a 4 cardinals only to get up and find the yellow tang and one cardinal missing.

So in short any ideas? I don't want to be know as the fish killer, My fish supplier has been out looked at the tank and is stumped also. The water PH seems low @7.4 and ammonia is little high this morning I believe because of the dead missing fish. salt is 1.025 and water temp77-78.
 
Your tank will have a mini-cycle after you move it. Let it chill out for a month or six weeks before you add anything new. It probably won't take that long, but better to be safe than sorry.

The ammonia is not only from the dead fish but also the dying bacteria from where you disturbed the sand and rock - it does not take much. You get oxic and anoxic zones in an established tank and a move will jack some of them up. ...normal stuff, but it takes time to get sorted out.

Your existing fish will have less stress than the new ones and able to cope better. Still not great for them, but better than the new additions.
 
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