To UV or not to UV

Justdabubbletip

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15 Fish Lost In Days..

Normally I would just research this kind of thing into the ground, but my mind is in such a bad place right now. All of my fish had been quarantined. I used safety stop before introducing them into the tank. I purchased a whitetail bristle tooth tang, and didn’t do any quarantining because I let myself get blinded by excitement and thought “well people do this all the time”.

Of course, I would be the one statistic where it’s not fine lol.. the tang introduced Marine Velvet to my tank and I ended up losing almost all of my fish.

All of that to say, now that I’ve experienced this, and I will be going through a fallow period, I am extremely tempted to run UV 24/7 after this. My tank is around 360 gallons of total water volume. I’m just trying to outweigh the pros and cons of running a UV Sterilizer I guess? It would be at the flow rate necessary for pathogens. I apologize for likely beating a dead horse but I’m so depressed right now.
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exnisstech

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Sorry for your loss.
Personally I wouldn't depend on UV to prevent disease. I would either run all new fish through a full medicated QT as outlined in the fish disease forum or run an observation QT for a 30 day minimum. I keep all new additions in observation after loosing fish in medicated QT. I have 4 tanks running with quite a few fish including 11 tangs some coming up on 10 years. The most important prevention for me is to buy fish that look healthy and are not housed in tanks with low salinty or low level copper.
PS. Do you know what the cause of the deaths was? I'm not a fish medic but I'm not seeing obvious signs of disease like ich or velvet.
 

Boehmtown

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If you don't have any fish left. I'd leave that tank fishless for like 4 months, dose phyto in whatever amount keeps your nutrients where you want them and get some interesting inverts for the time being. I'd wait to get whatever evil is in there out. Honestly. I've run tanks phyto only. Works well. Especially reef nutrition. There's is the thickest. And if you're really gonna spend some money on these fish. I'd set it up one you can run temporarily in the display, and only run it if you need it. Maybe when you introduce new fish or have a problem. But I generally don't use them unless it's a fish only tank. Although the advice seems split.
 

vlangel

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15 Fish Lost In Days..

Normally I would just research this kind of thing into the ground, but my mind is in such a bad place right now. All of my fish had been quarantined. I used safety stop before introducing them into the tank. I purchased a whitetail bristle tooth tang, and didn’t do any quarantining because I let myself get blinded by excitement and thought “well people do this all the time”.

Of course, I would be the one statistic where it’s not fine lol.. the tang introduced Marine Velvet to my tank and I ended up losing almost all of my fish.

All of that to say, now that I’ve experienced this, and I will be going through a fallow period, I am extremely tempted to run UV 24/7 after this. My tank is around 360 gallons of total water volume. I’m just trying to outweigh the pros and cons of running a UV Sterilizer I guess? It would be at the flow rate necessary for pathogens. I apologize for likely beating a dead horse but I’m so depressed right now.
20260531_143325_5CCE3EE7-9DDD-42CA-8897-1426ABA2CCC3.png


20260531_143326_9E3C8311-33B5-436E-A407-5AA17F683F50.png


20260531_143326_49978805-1C81-4A49-B827-D2339E4181DE.png


20260531_143326_FFABC379-2D35-4B3A-8F70-4272A492ABFF.png


20260531_143326_08A9AB98-11DE-4B02-BDF0-BEE63D61CDCD.png


20260531_143326_FCB32AE5-6E19-475E-A923-BE120A158D8D.png
I also had a disease event the end of January. Prior to that it had been 25 years since I had a major disease outbreak. My tank is only a 75g but I lost 7 or 8 fish, some were long time pets. 😔 So I know how you feel.

I did buy a UV sterilizer but I also know that is not a guarantee against disease. It should control ich in the free swim stage but I am also QT fish for observation and possible treatment before introducing them to my display.
 
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Justdabubbletip

Justdabubbletip

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When you get ready to re introduce fish look up Paul b posts or buy his book. Choose your fish using his method. I did bought 7 at once had no other fish in the tank. I put them all in at once bingo. No sense in doing qt
I will definitely look into that. Thank you
 
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Justdabubbletip

Justdabubbletip

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15 Fish Lost In Days..

Normally I would just research this kind of thing into the ground, but my mind is in such a bad place right now. All of my fish had been quarantined. I used safety stop before introducing them into the tank. I purchased a whitetail bristle tooth tang, and didn’t do any quarantining because I let myself get blinded by excitement and thought “well people do this all the time”.

Of course, I would be the one statistic where it’s not fine lol.. the tang introduced Marine Velvet to my tank and I ended up losing almost all of my fish.

All of that to say, now that I’ve experienced this, and I will be going through a fallow period, I am extremely tempted to run UV 24/7 after this. My tank is around 360 gallons of total water volume. I’m just trying to outweigh the pros and cons of running a UV Sterilizer I guess? It would be at the flow rate necessary for pathogens. I apologize for likely beating a dead horse but I’m so depressed right now.
20260531_143325_5CCE3EE7-9DDD-42CA-8897-1426ABA2CCC3.png


20260531_143326_9E3C8311-33B5-436E-A407-5AA17F683F50.png


20260531_143326_49978805-1C81-4A49-B827-D2339E4181DE.png


20260531_143326_FFABC379-2D35-4B3A-8F70-4272A492ABFF.png


20260531_143326_08A9AB98-11DE-4B02-BDF0-BEE63D61CDCD.png


20260531_143326_FCB32AE5-6E19-475E-A923-BE120A158D8D.png
I also had a disease event the end of January. Prior to that it had been 25 years since I had a major disease outbreak. My tank is only a 75g but I lost 7 or 8 fish, some were long time pets. 😔 So I know how you feel.

I did buy a UV sterilizer but I also know that is not a guarantee against disease. It should control ich in the free swim stage but I am also QT fish for observation and possible treatment before introducing them to my display.
I’m sorry to hear that! I’ve been in the hobby my whole life, never thought it would happen to me. Got too lax with it
 
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Justdabubbletip

Justdabubbletip

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Sorry for your loss.
Personally I wouldn't depend on UV to prevent disease. I would either run all new fish through a full medicated QT as outlined in the fish disease forum or run an observation QT for a 30 day minimum. I keep all new additions in observation after loosing fish in medicated QT. I have 4 tanks running with quite a few fish including 11 tangs some coming up on 10 years. The most important prevention for me is to buy fish that look healthy and are not housed in tanks with low salinty or low level copper.
PS. Do you know what the cause of the deaths was? I'm not a fish medic but I'm not seeing obvious signs of disease like ich or velvet.
Thank you for your insight! Yes, I know uv isn’t an end all solution I was just curious if it helps enough to mess with. All of my fish had been through a good quarantine process and were extremely healthy in the tank for months. I jumped the gun and put the bristletooth in my tank as the goal to be my very last fish.. 🥲 here are some pictures of it still alive. Seeing the fish after dying doesn’t help.
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vlangel

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I’m sorry to hear that! I’ve been in the hobby my whole life, never thought it would happen to me. Got too lax with it
Me too, it happens! But we can move forward with better protocols in place to reduce and mitigate a disease event.
 

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