Fished dying overnight help!

[nkxyy]

I have no idea whats happening but my fishes keep dying. Corals are doing well (except the duncan) and so are the tangs and inverts. Other than that the fishes keep dying like damsels. I did do water changes over the past few days changing out >25% each time hoping to turn the tides any tips?

 

[Gtinnel]

Posting parameters would be a big help. Also, have you noticed the tank water being cloudy?

IME when fish start dying without any sign of disease it may be low oxygen levels, often from a bacterial bloom in the tank.

 

[monkeyCmonkeyDo]

What size tank? Tangs could be killing them. Or lack of o2. How longs your tank been running?
You have a skimmer?
-d

 

[nkxyy]

What size tank? Tangs could be killing them. Or lack of o2. How longs your tank been running?
You have a skimmer?

My tank is a red sea reefer 200xl yes i am running a bubble magus Curve a5 and its only been 2 months

 

[monkeyCmonkeyDo]

How bigs that tank?
D

 

[monkeyCmonkeyDo]

Its xl so i cant imagine small and no room being the problem.
D

 

[nkxyy]

Posting parameters would be a big help. Also, have you noticed the tank water being cloudy?

IME when fish start dying without any sign of disease it may be low oxygen levels, often from a bacterial bloom in the tank.

I do not have everything but this. The salinity is at 30.1 ppt

 

[monkeyCmonkeyDo]

Is that a fresh water test kit? What am i looking at? You have a refractometer with calibration fluid? We will get u dialed in. Lots of helpful folks here.
D

 

[nkxyy]

Is that a fresh water test kit? What am i looking at? You have a refractometer with calibration fluid? We will get u dialed in. Lots of helpful folks here.
D

Yes it is but i should work. Does it not? And the tangs aren't aggressive at all

 

[Gtinnel]

I don't believe most test kits will work for both saltwater and freshwater tanks. I'd strongly reccomend getting some test kits or taking your water to a lfs to get it tested if that's an option.

 

[Gtinnel]

Its xl so i cant imagine small and no room being the problem.
D

It's a fairly small tank with the display being around 40 gallons.

 

[nkxyy]

a

I don't believe most test kits will work for both saltwater and freshwater tanks. I'd strongly reccomend getting some test kits or taking your water to a lfs to get it tested if that's an option

alright will do

 

[nkxyy]

I don't believe most test kits will work for both saltwater and freshwater tanks. I'd strongly reccomend getting some test kits or taking your water to a lfs to get it tested if that's an option.

alright will do thank you for the help!

 

[jmichaelh7]

Salinity is important , please double check

 

[Gtinnel]

Also if low oxygen level is the cause then adding surface agitation will help with the gas exchange in addition to the skimmer. Bacterial blooms that strip oxygen from the water is pretty common in newer tanks.

 

[monkeyCmonkeyDo]

Ur tanks to small imo to house tang fish and other fish. How many tangs?
D

 

[Cell]

Pic of tank please.

 

[Mr. Mojo Rising]

your salinity is off, tank is too small for a tang. I think i see a test strip in your pic, which is totally unreliable IMO. And this is only what we can see in your short post, there are many important details you haven't mentioned. It seems to point to lack of research before the purchase.