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Bacteria or disease in Brook trout?

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#1 HoundsNTrout

  • NANFA Guest
  • Pulaski, NY

Posted 04 April 2018 - 08:10 AM

Anyone ever seen anything like this?  I am guessing bacterial but uncertain. Only the Brook trout have gotten it so far. And I sure hope not many more come up with it. 
Lethargic and normally floating around the surface, look dead but gasping. 
​I have plucked Three out like this within 2 weeks. 

​One thing I DID do is dose the tank with H2O2 which I periodically do anyway for slight fungal things because of handling the fish now and then. 
​I also dosed with praziquantel for 5 days as well as fenbendazole for one day about a week after the prazi.  Don't as why, I just did.  

​I'm HOPING that's what it was and no others get this.  

​But if not, what else?   I use well water and 20% fresh influx with bio filtration never seen anything like this in 6 years of raising trout. 

​None of the rainbows exhibit anything, just 3 brooks so far.  


I mean just dosing the tank for the heck of it is bad enough but usually salt treatments and H2O2 won't kill them at the dosages I'm using and with the H2O2 anyway, that will get the gills pretty quick and seems I'd have a hell of a lot more death.  

​thanks for any input.  I'm concerned it will spread. 

​But, I'm considering those fish selected against, and hope all others will not pick this up.  

​Notice the pale color and skin discoloration too almost like dying salmon.  I didn't get photo but the other side of this fish also had a 'pimple looking' thing in center mid level.  

I mean there are just so many things this could be its hard to just say I'm gonna hit the tank for gram neg or gram pos  bacteria without knowing for sure what it may be.  And I'm taking the fish down to Cornell either and spending a fortune on possible diagnosis.  

​Thanks folks. 

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Edited by HoundsNTrout, 04 April 2018 - 08:14 AM.

#2 centrarchid

  • NANFA Member

Posted 04 April 2018 - 02:48 PM

Stressing prevention rather than treatment, I suggest working to lower organic load in water.

Find ways for people not already interested in natives to value them.

#3 HoundsNTrout

  • NANFA Guest
  • Pulaski, NY

Posted 05 April 2018 - 10:06 AM

Any ideas on DIY skimmers?  I don't have skimmers but I used a bottom bar with holes that pumps debris and some suspended matter up to two 100 micron socks.   
​I agree, water sometimes gets slightly cloudy when I feed a good amount of food. Need a better system for the organic matter.  
​Not sure what else to do. 


#4 Matt DeLaVega

Matt DeLaVega
  • Forum Staff
  • Ohio

Posted 05 April 2018 - 04:44 PM

Higher quality feed?

The member formerly known as Skipjack

#5 HoundsNTrout

  • NANFA Guest
  • Pulaski, NY

Posted 06 April 2018 - 09:31 AM

I feed a quality kibble.


#6 Matt DeLaVega

Matt DeLaVega
  • Forum Staff
  • Ohio

Posted 06 April 2018 - 05:25 PM

No doubt. However all kibble are not created equal. Thinking of fouling the water, not along the lines of poor diet. I should have taken a moment to elaborate on and better word my above post. It seems that some feeds more than others, foul water. Some are super oily. Some are less digestible. Feed for small scale aquaculturists is often whatever brand can be found within a half day's drive. If this is water quality related at all, it might be worth a look into feed comparisons if you haven't already.

The member formerly known as Skipjack

#7 sbtgrfan

  • NANFA Member
  • Charleston, SC

Posted 08 April 2018 - 07:52 AM

Without a proper necropsy, skin scrape and gill clip under a microscope, you may never know. We can make theories on water quality or your dosing potentially unnecessarily, but that’s all it will be - theories. To find the cause and how to treat properly you have to know what it is and to know what it is you’ll need to do a necropsy. You don’t have to spend a fortune doing one, all you need is a relatively decent microscope and some slides.
Stephen Beaman
Freshwater Aquarist
South Carolina Aquarium
Charleston, SC

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