Two dead fish

[Guynamedfish]

So I had two deaths this morning my mandarin goby died and my chocolate chip starfish I did a water Chang and the ph levels were fine and the mandarin and Star were eating they seemed healthy but they just died my stock is 2 clown fish 1 canary blenny and a pajama cardinal

 

[Guynamedfish]

So any ideas what happend

 

[Guynamedfish]

Also the water change was 3 days ago

 

[Dave1993]

how old is your tank

 

[ZombieEngineer]

How old is your tank?

When did you add your most recent fish and which fish was it?

Did you quarantine your fish before adding them or buy pre-quarantined fish from DrReef or similar service?

Did you notice white specles or what looks like powdered sugar dust on any of your fish recently?

Did you notice red streaks on any of your fish recently?

 

[Dave1993]

How old is your tank?

When did you add your most recent fish and which fish was it?

Did you quarantine your fish before adding them or buy pre-quarantined fish from DrReef or similar service?

Did you notice white specles or what looks like powdered sugar dust on any of your fish recently?

Did you notice red streaks on any of your fish recently?

it would not have been parasites that killed the mandarin they have a very thick slime coat and very resistant to external parasites it is most likely a 3 month old 30 gallon tank and the mandarin starved also the star fish

 

[ZombieEngineer]

it would not have been parasites that killed the mandarin they have a very thick slime coat and very resistant to external parasites it is most likely a 3 month old 30 gallon tank and the mandarin starved also the star fish

Even if its not the most likely cause, I wouldn't rule it out. I got a mandarin and didn't QT it because someone told me the same thing you just did about the slime coat. It was added 2 months after my last fish, which were quarantined, and it had Velvet. Killed every fish in my tank in 3 days except for a single clown that survived emergency copper treatment and killed at least $2000 worth of coral from the resulting ammonia spike.

 

[threebuoys]

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[Guynamedfish]

How old is your tank?

When did you add your most recent fish and which fish was it?

Did you quarantine your fish before adding them or buy pre-quarantined fish from DrReef or similar service?

Did you notice white specles or what looks like powdered sugar dust on any of your fish recently?

Did you notice red streaks on any of your fish recently?

My tank is 3 months old
I added the canary blenny was added 4 days ago
I didn’t quarantine the fish no symptoms of anything I saw them eating and then they just died during the night

 

[Dave1993]

My tank is 3 months old
I added the canary blenny was added 4 days ago
I didn’t quarantine the fish no symptoms of anything I saw them eating and then they just died during the night

what did i tell you 3 month old tank i bet its 30 gallons too the mandarin and starfish starved your tank is no where near ready to keep a mandarin

 

[Dave1993]

Even if its not the most likely cause, I wouldn't rule it out. I got a mandarin and didn't QT it because someone told me the same thing you just did about the slime coat. It was added 2 months after my last fish, which were quarantined, and it had Velvet. Killed every fish in my tank in 3 days except for a single clown that survived emergency copper treatment and killed at least $2000 worth of coral from the resulting ammonia spike.

^

 

[blaxsun]

Agreed - the mandarin most likely starved. The chocolate chip starfish would've eventually gone after your corals, so that's probably a blessing in disguise (these starfish are food for certain shrimp).

And velvet will kill a mandarin.

 

[vetteguy53081]

Did you match salinity and temperature of new water with that of display tank?
Are you using tap water from faucet or RODI water ?
You said Ph level was fine. What is your reading for ph-ammonia and nitrate and what test kits are you using?
Did Mandarin have a film on its body when you discovered it ?

 

[ZombieEngineer]

My tank is 3 months old
I added the canary blenny was added 4 days ago
I didn’t quarantine the fish no symptoms of anything I saw them eating and then they just died during the night

Since you recently added a fish, parasites are possible buy the mandarin is the least likely of your stocking list to be the only one affected. Starfish are very sensitive to ammonia and also was likely starving as well since they survive off detritus. It's hard to feed enough excess to keep a large starfish fed without polluting the tank in a 30g.

A mandarin requires a mature tank that has a large refugium and the display needs to be in excess of 55g. These fish eat 1000s of copepods a day so they will slowly starve in a 30g.

I would not completely rule out parasites though. Keep a very close eye on your remaining fish and look up the symptoms for ich, brooklynella, and marine velvet. If you do, get them into a seperate quarantine tank and treat with Copper Power. You would also have to leave your display tank fallow for between 30 and 72 days depending on which type it was.