Wrasses keep dying help needed

[yxtrx3]

Hi all, a few weeks ago I bought a fairy wrasse that was doing well, eating food and suddenly one night it was banged up and ignored food that day, the day after that it died. I thought it was a coincidence as my store QTS all of its fish and all my livestock is from there and very healthy. Later, I bought a jeweled leopard wrasse it was eating frozen swimming well and sleeping well under the sand. It suddenly stopped eating and was under the sand most for 2 days, in the morning it was on its back and then became normal then died later that evening. all my other fish are fine and so are params does anybody know?

 

[Mr. Mojo Rising]

If you want help then you will need to provide the info and not just say "everything is normal". We can't see your tank, we need the info.... tank age, tank size, what other fish in the tank, ammonia/nitrate levels, and a tank picture will help too.

 

[yxtrx3]

If you want help then you will need to provide the info and not just say "everything is normal". We can't see your tank, we need the info.... tank age, tank size, what other fish in the tank, ammonia/nitrate levels, and a tank picture will help too.

Hi, 1 year old almost, 40 gallons
Kh 7.8
Ca 390
Mg 1260
No3 15
Po4 0.07
Sg 1.025
Ph 8.4

0 ammonia, other fish: Flame hawk, clown pair, algae blenny, midas blenny, sand goby, 3 firefish, mimic yellow peel tang (will be moved out when bigger, )