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beanbag

Low level bacterial infection?

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beanbag

Hello folks,

I have a Taiwan Bee tank that has been up and running with shrimp for almost a year now. Overall things are ok but once every several weeks or months 1-2 shrimp get taken out. I can't pin this down to anything, except maybe it was during a warm stretch and I ran the AC more often and the rest of the room was hotter. (The tank has a cooler, so the temps don't get above 70F) The symptoms are that their antennae become shortened or half-broken off, and they become lethargic. Sometimes they can stay in this state for a few weeks before finally keeling over. In the meantime, everybody else is doing just fine.
A while ago, I isolated one of the shrimp in a quarantine tank and treated it with Maracyn 2 (minocycline) for 4 days. It seemed to work, as afterwards that shrimp returned to activity. But unfortunately a few weeks later it became sick again, and another shrimp also got the same symptoms. (Antennae became shortened for a few days first, then became inactive)

So at this point I can either isolate both shrimp and treat them again, or just treat the whole tank.

I would rather not do the latter because everybody else is doing fine and I read conflicting reports on whether Maracyn 2 will nuke the filter bacteria.
Is there anything else I can add to the tank to be more anti-bacterial or preventative?
I already have low pH (6.0), low temps (68F), some Indian Almond leaves (not that much, tho), and I change 20% the water every 1-2 weeks.
Other things I can think of doing are: Dr. Tim's Eco Balance, Melafix, regular H2O2 treatments, some different kinds of food, etc?

Tank parameters: pH = 6, NH3 , NO2, NO2 = 0, GH=5, KH=0, temp=67-69F

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jayc
1 hour ago, beanbag said:

Other things I can think of doing are: regular H2O2 treatments

Can you get your hands on a Sochting Oxydator?

I would try this first. You can treat the whole tank. The increased oxygen will help the shrimps and fights bacteria. Increased oxygen has been shown to fight Gram Negative and Positive bacteria.

 

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beanbag

I think I can get one.  But I already use an airstone anyway...

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jayc
57 minutes ago, beanbag said:

But I already use an airstone anyway

Airstones don't increase the oxygen level as much as an oxydator. 

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  • Posts

    • jayc
      How hot has it been the week before they were delivered?
    • Ludwiggg17
      I'll try quarantining them starting tomorrow morning and try to keep an eye out if there is any development on their condition.
    • sdlTBfanUK
      I wouldn't want to commit using those photos, and I don't know what a healthy shrimp of that type looks like to be honest. I would expect some discolouration from shipping etc, but that same thing could also have made them sick as you say. When I looked up pictures on google all the shrimps were a cloudy light brown so they are naturally cloudy and maybe just lost some colour in transit, see if anything changes in a day or two? Can you remove them and keep them separate for maybe a week, even in a bucket etc, using tank water as they have acclimated to that already! Of course catching and moving them again will stress them even more............ Simon
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