HELP Velvet in a 240 gallon! How to save my fish.

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Hello, I have a wonderful 240 gallon system that is fully stocked. We are in the process of setting up another lagoon/frag tank and recently bought first fish additions. Our quarantined fish caught velvet and despite treatment we lost everything.

Our worst nightmare has likely come true and despite our best effort it has likely got into our main display as we saw our PBT swimming into the power head early this morning. No other signs but I’m terrified.

Has anyone successfully caught and treated 30+ fish from a system and how did you do it??

we have a 40 breeder QT, 2 55 gallon totes that we are currently filling with water. We have copper and Hannah checker ready. Willing to spend and do whatever it takes.

tank:
200g+40b sump
55x + tank turnover
91 watts UV running 600 GPH
Apex and Hannah monitored
parameters stable, can post recent ICP if it’s helpful.

we love our tank and our fish and have names and relationships with each and everyone. Spent countless hours and dollars trying to give them the best environment possible and as a doctor I’m ashamed that I let our tank get infected.

please help save:

7 blue chromis
6 lyretail anthias
CBB
PBT
Yellow tang
Purple tang
Sailfin
Mimic tang
2 bristle tooth
4 wrasse
Mandarin dragonette
Blue spot jawfish
Yellow goby
Midas blenny
Dwarf angel
2 clowns

Video was taken yesterday afternoon.
 

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Hello, I have a wonderful 240 gallon system that is fully stocked. We are in the process of setting up another lagoon/frag tank and recently bought first fish additions. Our quarantined fish caught velvet and despite treatment we lost everything.

Our worst nightmare has likely come true and despite our best effort it has likely got into our main display as we saw our PBT swimming into the power head early this morning. No other signs but I’m terrified.

Has anyone successfully caught and treated 30+ fish from a system and how did you do it??

we have a 40 breeder QT, 2 55 gallon totes that we are currently filling with water. We have copper and Hannah checker ready. Willing to spend and do whatever it takes.

tank:
200g+40b sump
55x + tank turnover
91 watts UV running 600 GPH
Apex and Hannah monitored
parameters stable, can post recent ICP if it’s helpful.

we love our tank and our fish and have names and relationships with each and everyone. Spent countless hours and dollars trying to give them the best environment possible and as a doctor I’m ashamed that I let our tank get infected.

please help save:

7 blue chromis
6 lyretail anthias
CBB
PBT
Yellow tang
Purple tang
Sailfin
Mimic tang
2 bristle tooth
4 wrasse
Mandarin dragonette
Blue spot jawfish
Yellow goby
Midas blenny
Dwarf angel
2 clowns

Video was taken yesterday afternoon.
Take a look a @Jessican ’s UV and Peroxide dosing thread. This may be an option if catching and treating 30+ fish and leaving display fallow is not doable.
 
Last edited:

Jposch

Leather Lover
QT Fish Vendor
Location
Minnesota
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I Second starting peroxide dosing asap, no matter what your long term plan is. A rushed QT ends up a mess most always.
The easiest for me, was to get a large plastic stock tank, drain the DT into it down to about an inch of water, and scoop the fish out after. Least likely method to require moving your rocks and stirring up the sandbed. But, I understand. It's not feasible for everyone. Even acropora can handle being dry for 15-20 mins. You want to use a large diameter hose to make the drain and fill part as fast as possible. You can have someone spritz the coral with a spray bottle of tank water if worried.
 

Surgeon Fish

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Thread starter
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If you end up going the QT route, I recommend using a large trough or tub with a bioreactor for that bioload: Bio Reactor – Bashsea

Several LFS I advise that QT their fish in the back before selling run those Bashsea Reactors on the QT systems.
I was going to stop at tractor supply and get a 100 gallon stock tub. Didn’t think of the bio reactor. I have a spare reactor I could buy some pellets and add a bacterial agent to start.

would you recommend I try and catch them all and QT or does this peroxide/UV method have potential?

have a bacterial additive that’s your go to, I know you list multiple in your QT thread?

we feed heavy and often 4-6 times a day with vitamin enhanced

thank you for your help sir!
 

Humblefish

Dr. Fish
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Wandering Nomad
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would you recommend I try and catch them all and QT or does this peroxide/UV method have potential?
I don't have any firsthand experience with in-tank peroxide dosing, but it looks promising if you catch symptoms early on.

have a bacterial additive that’s your go to, I know you list multiple in your QT thread?
Fritz Turbostart 900
 

Surgeon Fish

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I don't have any firsthand experience with in-tank peroxide dosing, but it looks promising if you catch symptoms early on.


Fritz Turbostart 900
Here are some videos idk how helpful they are:
 

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Surgeon Fish

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@Surgeon Fish The fish generally look fine from what I can tell, although I think I can see dust (velvet) on some of the fins.

Are you running a UV or Ozone to help mitigate the disease issues??
Currently have a 36 and 55 watt plumbed in series with 600 GPH running through it.

I’ve never done ozone but I will look into it ASAP. Just did our second dose of peroxide and increased feeding.

PBT has not been swimming in the power head at all today but I’m still extremely concerned.
 

Jessican

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Location
Fremont, CA
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Currently have a 36 and 55 watt plumbed in series with 600 GPH running through it.

I’ve never done ozone but I will look into it ASAP. Just did our second dose of peroxide and increased feeding.

PBT has not been swimming in the power head at all today but I’m still extremely concerned.
If you’re dosing peroxide with UV running, I wouldn’t add ozone to that.
 

Jposch

Leather Lover
QT Fish Vendor
Location
Minnesota
Country flag
If you’re dosing peroxide with UV running, I wouldn’t add ozone to that.
I have added peroxide to my ozonated tank when killing aptasia, and also to .y frag tank in attempt to clear up cyano. I didnt see any negative effect. Ozone probably won't help for an active velvet infection. And, if you were to run based on ORP like suggested everywhere, the unit will be switching on&off all day which is obviously not ideal for parasite management.
 

Gentlefish

Member
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so sorry for your troubles. Beautiful display. Had velvet myself lost nearly everything. 3 fish survived in copper. With nitrate spike loss 80% of corals, too. Hope you see improvement. Just my 2cents as a plan B. In your setup, it would be easier to remove rocks and corals to your breeder and treat with copper than vice versa. It would be far far from ideal given your 🐠 re Mandarin and copper sensitivity fish. Best of luck!
 
If this peroxide treatment works we will owe you big time.
Are you running UV too?
There is some evidence they are synergistic, and used in water purification.
Supposedly the UV (if it has the right kind UV-A) breaks down some of the H2O2 in the tube into hydroxyl radicles that are very powerful oxidizers.
 

Humblefish

Dr. Fish
Location
Wandering Nomad
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Currently have a 36 and 55 watt plumbed in series with 600 GPH running through it.
That is likely what's saving your fish (for now), but it probably won't be enough long-term. Have you started dosing H2O2?

 

Jessican

Sheriff
Location
Fremont, CA
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I have added peroxide to my ozonated tank when killing aptasia, and also to .y frag tank in attempt to clear up cyano. I didnt see any negative effect. Ozone probably won't help for an active velvet infection. And, if you were to run based on ORP like suggested everywhere, the unit will be switching on&off all day which is obviously not ideal for parasite management.
Are you running UV as well, though? The combo of peroxide + UV is a much more powerful oxidizer than peroxide alone, so that’s why I wouldn’t personally add ozone on top of it.
 

Jessican

Sheriff
Location
Fremont, CA
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If this peroxide treatment works we will owe you big time.
We’ve seen it work well a few times now, so fingers crossed for you! It sounds like you caught it early, which it when it seems to work best. And you already have UV running, so even better. Let me know if you have any questions about the treatment.
 
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