Help!

[Drake29]

I did a water change last Saturday after the water change all my fish started to die .The. Corals and closed up and the cuc are still alive . Could I just drain the whole tank and put new saltwater back in and would I lose all of my beneficial bacteria?

 

[HuduVudu]

You need to figure out whether the water change was the cause or if something else was at play.

Just acting without knowing the cause is a the recipe for a series of disasters that will break you.

Deep breath think clearly and try to understand what happened.

 

[MnFish1]

I did a water change last Saturday after the water change all my fish started to die .The. Corals and closed up and the cuc are still alive . Could I just drain the whole tank and put new saltwater back in and would I lose all of my beneficial bacteria?

Can you give some more information?

1. How big was the tank?
2. How big was the water change?
3. Did you use RODI water or tap water?
4. Did you change salts?
5. Did you mix the salt appropriately?
6. What kind of fish - how new were they and did they die immediately after the addition or are dying slowly 'now'?
7. Do you have parameters measured now?
8. Do you know parameters measured before? (salinity, pH, etc etc)
9. If any fish are alive - did they have symptoms?

Sorry for the questions - and sorry for your problem. Hope this helps

 

[Garf]

I did a water change last Saturday after the water change all my fish started to die .The. Corals and closed up and the cuc are still alive . Could I just drain the whole tank and put new saltwater back in and would I lose all of my beneficial bacteria?

Bacteria will be good, most of it is on surfaces, not in the water.

 

[MnFish1]

I did a water change last Saturday after the water change all my fish started to die .The. Corals and closed up and the cuc are still alive . Could I just drain the whole tank and put new saltwater back in and would I lose all of my beneficial bacteria?

Please read what @HuduVudu wrote - which is also why I asked you those questions. Check your current parameters - salinity, pH, alkalinity, etc - if they are off - then you can try to figure out what changes to make. Lots of things can cause this after a water change - poorly mixed salt, a bad batch of salt (in which case changing all of the water is not going to help), low oxygen, or something else. The good news - its unlikely to be a 'disease' killing the fish. I know none of this makes it easier - but the good news is that corals often recover - and making quick changes (unless you know the cause) often makes a bad situation worse.

 

[ying yang]

First thing I would be doing if all my fish and corals was OK then did a water change and fish started to die and corals started closing up is check whatever I use to check my salinity and make sure calibrated ,incase it's off and I dramatically changed the salinity with the water change ,and dramatically changing salinity would also affect other parameters I read often.
Then I would be thinking stuff like how old is my tank/ sandbed and did I disturb sandbed to much possibly releasing " hydrogen sulphide " I think it is ( maybe wrong )
Then I would be trying to rule out stuff like did I have any contaminants on my hands or it dropped in water change vessel etc.
As said above if remove all water ( 100% water change) beneficial bacteria on/ in the rocks/ sand and little in the water apparently ) but that's a little drastic thing to do unless know reason why you want to do 100% wc.

Good advice in posts above.
Hope you get to bottom if why it happened .
But just thinking you did wc last Saturday and posting now Tuesday night, did they start dying Saturday/ Sunday or few days later ?
I see jay who resident fish diesese expert say if fish are affected but not corals and cuc then points to fish diesese but if all tank affected then usually points to problem with parameters / water etc.
Your problem is fish dying and corals affected by closing up but cuc unaffected .

Anyway good luck and hope you figure it out

 

[Drake29]

You need to figure out whether the water change was the cause or if something else was at play.

Just acting without knowing the cause is a the recipe for a series of disasters that will break you.

Deep breath think clearly and try to understand what happened.

My local lfs checked my parameters and everything was good they said a fragrance got in the tank .the only fish I have left is a clown that breathing heavy and has like a burn on his mouth

 

[Garf]

My local lfs checked my parameters and everything was good they said a fragrance got in the tank .the only fish I have left is a clown that breathing heavy and has like a burn on his mouth

Can you check your heater is working ok?

Edit - a good white light pic of the tank would be nice.

 

[vetteguy53081]

I did a water change last Saturday after the water change all my fish started to die .The. Corals and closed up and the cuc are still alive . Could I just drain the whole tank and put new saltwater back in and would I lose all of my beneficial bacteria?

Sounds like shock
Was water mixed to temperature same as display tank?
How did you mix salt mix?
Are you using RODI water or tap water from the faucet?
did you match batch salinity and display tank salinity ?
Did you put your hand in the tank right after handling any chemicals ?
Was the container used clean?

Also possible that when water was entered into tank, it caused an ammonia spike

 

[Drake29]

Can you check your heater is working ok?

Edit - a good white light pic of the tank would be nice.

I will be a new heater just incase

 

[MnFish1]

First thing I would be doing if all my fish and corals was OK then did a water change and fish started to die and corals started closing up is check whatever I use to check my salinity and make sure calibrated ,incase it's off and I dramatically changed the salinity with the water change ,and dramatically changing salinity would also affect other parameters I read often.
Then I would be thinking stuff like how old is my tank/ sandbed and did I disturb sandbed to much possibly releasing " hydrogen sulphide " I think it is ( maybe wrong )
Then I would be trying to rule out stuff like did I have any contaminants on my hands or it dropped in water change vessel etc.
As said above if remove all water ( 100% water change) beneficial bacteria on/ in the rocks/ sand and little in the water apparently ) but that's a little drastic thing to do unless know reason why you want to do 100% wc.

Good advice in posts above.
Hope you get to bottom if why it happened .
But just thinking you did wc last Saturday and posting now Tuesday night, did they start dying Saturday/ Sunday or few days later ?
I see jay who resident fish diesese expert say if fish are affected but not corals and cuc then points to fish diesese but if all tank affected then usually points to problem with parameters / water etc.
Your problem is fish dying and corals affected by closing up but cuc unaffected .

Anyway good luck and hope you figure it out

Good idea on the sanded