Fish Dying HELP

[Senecas20]

Fish are dying in my 20 gallon nano tank. My corals are doing great but my fish are dying. All of my parameters are spot on. Any suggestions why fish are dying but corals are fine?

 

[Rmckoy]

Any pictures and list of tested parameters with their tested value .
Spot on doesn’t say what value or what test kit was used .

sometimes pictures are worth 1000 words

 

[Rmckoy]

How long has the system been running ?

 

[kados]

@Senecas20 this forum is a great place to share, learn and grow in the hobby. Figuring this is a brand new setup based on info provided I had a look at your previous posts. Tank is approximately a month old. What fish do you have in there? How long have they been in there? How was the tank cycled? Were the fish quarantined? And as mentioned what are the exact parameters/kit used to measure? I know it's a lot of questions but these may help answer your question.

 

[blaxsun]

Fish are dying in my 20 gallon nano tank. My corals are doing great but my fish are dying. All of my parameters are spot on. Any suggestions why fish are dying but corals are fine?

As suggested above, tank details, water parameters and images would be helpful. How many fish did you start with, how many are ill, how many have died, etc.?

 

[nereefpat]

Disease, likely.

 

[i cant think]

If coral are just fine then it won’t be parameters. Usually with parameters, corals will die off first then as ammonia and nitrates/nitrites spike you’ll see a fish die off. Definitely down to a disease, see any spots on the dead fish?

 

[jmichaelh7]

Did you quarantine ?

 

[Tamberav]

Fish are dying in my 20 gallon nano tank. My corals are doing great but my fish are dying. All of my parameters are spot on. Any suggestions why fish are dying but corals are fine?

Most likely disease... fish come from the ocean and bring parasites with them. They get mixed with 100's of other fish at the wholesaler where it spreads... they get sent to your LFS... which may run some medications or lower salinity which helps keep the fish looking ok there... but you bring it home to a regular reef tank and the low parasite load they were carrying multiplies and they become sick and it spreads to other fish and remains in your tank.

Generally you want to quarantine new fish or buy from a place that quarantines. Fish tend to get sick in 'new' tanks. Tanks that are not several YEARS old that is. Sometimes they get sick in old tanks too... just very prevalent in a new tank.

We need more details and photos and a list of the fish you have.

Likely you will need to catch them all and QT and let the tank sit fishless for 45 days (minimum) with no cross contamination at 81-82 degrees. Then QT all new fish.

I feel as if fish are the hardest learning curve for new hobbyist.

Anyways, please share more details. If there is indeed disease, we need to try and ID it for treatment.