Tank crash unknown reason

Aki Madafaki

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So about 10 days ago i decided to test the theory that SPS need mature tank and i got some good deal on 6 sps corals, 3 acros one sthylo and one pocilo and one plateing monti. My tank is 3 months old and i had one cheap single speed wave maker, pair of clownfish, 4 snails, couple of moshrooms one frogspawn and one snall hammer frag. On the day i added sps i also changed my wave maker and i replaced it with 2 hygger minis. Moning after everything was closed up and stressed and i figured it to much flow for my 20g tank so i removed one. After 2 to 3 days my acros bleached and my clownfish were in sever shock, i places them in qt tank, one survived and one died, i alo removed all new corals only left stylo because it was the only thing in the tank that was doing good. Tank recovered and it was doing good for 4 days and yeaterday i again noticed all my corals closed up and my fish breathing rapidly. Temeprature was the same whole time, salinity was the same, kh was good at the time of the first charsh about 8.4 and now i noticed it dropped to 7.7. No stray voltage, did multiple 10% and one 35% water cnage in the meantime, added fresh activated carbon 10 days ago. Amonia is at 0. Only think is i dont know what is the PH and can that cause the chras. Check the video below and Please help
 
I have a 3 month 20g tank and my corals are all closed up and my clownfish is stressed out. This happaned to me 10 days ago and one of my fishes died. Temp is stable. Salinity is at 35ppt. Kh was 8.4 all the time. I added fresh activated carbon as soon as i saw something was wrong, water is crystal clear, no stray voltage no anonia. Tank was doing good for 4 days and my surviveing clownfish was in qt tank and i put him back. Yesterday it all happened again and i noticed KH dropped to 7.7. check the video and please help.
 
Definitely going to need to provide more details regarding your other parameters. That is a small tank to put corals into while only being 3 months old. Tanks that small suffer from almost instant instability issues. Swings in a smaller tank arent felt as much in a larger tank.

Gut says you went all in too soon and the tank isnt mature enough yet to handle the bio load you have in there.
 
Yes i knew its a gable but i didnt have an idea that the losses can be this bad. Definitely gregreting i didnt get a bigger tank. Let me know what parameters would you like me to provide
 
How did you cycle your tank?

Flow and light of your tank?

Any recent changes?

Photo or video of your tank? (Not seeing the video that you “posted”)

Time frame of when you added stuff to your tank?

Ammonia present in your tank?

What test kits are you using?
 
One dead fish is not a tank crash.

Can you show a full tank picture of your tank, this really helps us. How many and what kind of fish is in the tank?

The kh drop seems more like a test error than an actual drop. What kind of test kit are you using?
 
How did you cycle your tank?

Flow and light of your tank?

Any recent changes?

Photo or video of your tank? (Not seeing the video that you “posted”)

Time frame of when you added stuff to your tank?

Ammonia present in your tank?

What test kits are you using?

How did you cycle your tank?

Flow and light of your tank?

Any recent changes?

Photo or video of your tank? (Not seeing the video that you “posted”)

Time frame of when you added stuff to your tank?

Ammonia present in your tank?

What test kits are you using?
Tank was cycled with dry rock and a portion of a live rock for my LFD and AquaForest Bio S



Light is Aqua Medic Qube 50



Only changes that i made are the ones that i mentioned in the post.



Im using Salifert test kits

 
One dead fish is not a tank crash.

Can you show a full tank picture of your tank, this really helps us. How many and what kind of fish is in the tank?

The kh drop seems more like a test error than an actual drop. What kind of test kit are you using?
Well its not about one dead fish its about the second one about to die and all my corals with it 😂

Did the test twice to confirm the resault. Using Salifert test kit.

 
What kind of light do you have? The mushroom (I think its a mushroom) on the bottom is stretching up, and there is lots of shade on the sand, some of the corals are in the shade.

Did you quarantine the fish before adding them to your tank? How long have they been in your tank?
 
Clowns and mushroms were in the tank since it was done cycleing and they were doing amazing with that amount of light. Its Aqua Medic Qube 50
 
What kind of light do you have? The mushroom (I think its a mushroom) on the bottom is stretching up, and there is lots of shade on the sand, some of the corals are in the shade.

Did you quarantine the fish before adding them to your tank? How long have they been in your tank?
Here is the video from abot 20 days ago

 
Here is the video from abot 20 days ago

In this video I still see many corals in the shade, I see very little water movement, and the clowns are at the top, so I wonder if low oxygen might be to blame for the fish death. The flow in the first video was much better
 
In this video I still see many corals in the shade, I see very little water movement, and the clowns are at the top, so I wonder if low oxygen might be to blame for the fish death. The flow in the first video was much better
They were on top because it was feeding they always came to the top when i was feeding 😁
 
So about 10 days ago i decided to test the theory that SPS need mature tank and i got some good deal on 6 sps corals, 3 acros one sthylo and one pocilo and one plateing monti. My tank is 3 months old and i had one cheap single speed wave maker, pair of clownfish, 4 snails, couple of moshrooms one frogspawn and one snall hammer frag. On the day i added sps i also changed my wave maker and i replaced it with 2 hygger minis. Moning after everything was closed up and stressed and i figured it to much flow for my 20g tank so i removed one. After 2 to 3 days my acros bleached and my clownfish were in sever shock, i places them in qt tank, one survived and one died, i alo removed all new corals only left stylo because it was the only thing in the tank that was doing good. Tank recovered and it was doing good for 4 days and yeaterday i again noticed all my corals closed up and my fish breathing rapidly. Temeprature was the same whole time, salinity was the same, kh was good at the time of the first charsh about 8.4 and now i noticed it dropped to 7.7. No stray voltage, did multiple 10% and one 35% water cnage in the meantime, added fresh activated carbon 10 days ago. Amonia is at 0. Only think is i dont know what is the PH and can that cause the chras. Check the video below and Please help

“So about 10 days ago i decided to test the theory that SPS need mature tank and“

@Aki Madafaki
Not knowing your skill level, I hope you realize that your test was not very prudent. I also challenge your title “Crash for unknown reason”. I think the reasons are very obvious.

Also your videos are of little value for diagnostic troubleshooting.

Test that you should be doing are alkalinity, ammonia, nitrate & phosphate.
 
Last edited:
“So about 10 days ago i decided to test the theory that SPS need mature tank and“

@Aki Madafaki
Not knowing your skill level, I hope you realize that your test was not very prudent. I also challenge your title “Crash for unknown reason”. I think the reasons are very obvious.

Also your videos are of little value for diagnostic troubleshooting.

Test that you should be doing are alkalinity, ammonia, nitrate & phosphate.
So can you explain the obvious reason to me please?
 
To me sounds like something more bacterial. I don’t believe just adding acros will cause everything to struggle even if the sps does. I would definitely test everything first and see if that gives an explanation. Did you dose or add anything else?
 

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