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Eliminating Copepods in Shrimp Tank


piste
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I wanted to share this experience in the hopes it is helpful to others.  I have a 5 gal tank that I have had for a while...with Painted Fire RCS.  It was neglected (long story) and got down to one inhabitant.  I restocked from an online source only to find stowaway copepods that multiplied significantly.  When I notified the supplier they did indicate they have had some issues with copepods but were also dismissive to say "they are not harmful".  Well, that is true and it is not.  They may not pose a threat to the shrimp...but I do not maintain shrimp tanks to be infested with unwanted pests.  So I debated what to do including potentially starting up another tank...transferring shrimp and break down my main tank. Then I read that someone had some good luck with eliminating copepods with Chili Rasporas acting as assasins.  I was gonna go that route...but those are hard to come by and quite pricey...somewhere around $30 or so for a handful of fish.  So I decided to go a similar route with neon tetras and an albino cory.  The thinking was the cory would patrol the lower tank and the neons would take care of any copepods above.  I went to my LFS thinking I would get 3 neons....decided to up it to 5 cuz they like to school and the clerk inadvertantly got 7 in the bag and at $1.25 per or so I said sure just keep them.  I put the 7 neons and the sole albino cory into the shrimp tank after acclimating them all...and lets just say magic ensued.  Within hours I could barely see a copepod and previously they were everywhere.  Not wanting to risk the assasins eating shrimplets I transplanted 4 of the neons after about 12 hours and at 24 hours transplanted the remaining neons to leave the cory on duty.  Throughout this I did observe the neons going after copepods even some that were hiding in the substrate.  I plan to leave the cory in there for a while longer at which point I will decide whether to keep him there...but likely some point transplant him as well.  I will post updates on future developments...but the copepod infestation really bothered me and at the moment I am happy with the outcome. 

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Thanks for that information, very interesting. I had an infestation of seed shrimp (?) a few years ago, and the mosquito rasbora and killie I put in there did the same, but your fish would be safer with shrimps in the tank!

Simon

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Well....I spoke a bit too soon.  The cory is still in the shrimp tank and I have observed some copepods but far fewer than I had.  I have noticed they like to burrow in the substrate and have probably surfaced now that the neons are gone.  I will leave the cory in there for a while as he does seem to furrow into the substrate presumable searching for copepods.   If the cory can at least keep them in check I may leave him there and leave it at that.  But neons are on standby if things get out of hand again!  We shall see.

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    • sdlTBfanUK
      There isn't much to report on this at the moment, I am 50/50 as to whether this is going to work or not long term. I have seen 2 dead shrimp since adding the new ones and counted about half of the new shrimp bought, that I saw yesterday! This is going to be a long term experiment I guess, the best I hope will happen at this point is that the remaining shrimp survive and reproduce and that new borns born in the tank should be more suited to the environment/water etc. There is an element of the acclimating didn't go as well/to plan as it should with my knowledge/experience, but I did the best I could, so that is what it is! Simon
    • Franks
      How is now the condition of pH?
    • sdlTBfanUK
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    • sdlTBfanUK
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    • sdlTBfanUK
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