Fish dying

[Medic3124]

So recently upgraded to a larger tank and moved all the rock and 80% of the water. The parameters are
Nitrite 0
Nitrate .25
Mag 1250
Ammonia 0
Ph 8.0
Salinity 1.026
Temp 78
So the problem is I’ve had 6 of my fish just die, my bubble tip is thriving and the rest of the fish seem to do doing ok. Any help or info you can provide will be greatly appreciated

 

[nautical_nathaniel]

Any symptoms that you can think of that led up to this?

 

[Medic3124]

Did have one that had ich but was moved to my hospital tank as soon as I noticed him acting strangely. Other than that it’s been like one a day since the change over

 

[Mr. Mojo Rising]

Whats the timeline on the upgrade? what is recently? last week last month? When did the fish die in comparison? All at once, one by one? did you add new fish? Did you check the likely culprits low oxygen, equipment failure?
your not really giving any clues here

 

[Medic3124]

Tank was upgraded last week and as a precaution did drip acclimation on all the fish. Getting good oxygen and water flow. They died one by one l, with the last one being sometime between last night and this morning. No signs of ich, brookynalea color still looked prefect and all these fish have had for a while no new introduction fish

 

[BryanM]

^^ This... We need more info.

.25 Nitrates is ultra low - It won't cause fish deaths, but that's alarmingly low to me. You also didn't list phosphate.

 

[Medic3124]

Well, i figured out the problem. My refractometer was broken and giving wrong readings. My salinity was barely 1.010. Slowly have been bringing it up over the past few days and the remaining fish are doing fine