White stringy feces...GC works but Prazi doesn't. What is it?

Discussion in 'Fish Diseases & Treatments' started by Sylvester, May 7, 2019.

  1. Sylvester

    Sylvester New Member

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    Update.. dosed tank 2 days ago with 7.6 mg/gallon fenbendazole. This is almost impossible to believe but after losing a half a dozen clowns and 4 cardinals my fish over 8 months and medications ranging from copper, CP, prazi, metro.... could a prazi resistant worm been the culprit all along?

    Thank you Humble Fish!

    My tank has been fallow 6 weeks. Is that enough? How long do i keep my fish in fendendazole?
     
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  2. Humblefish

    Humblefish Member

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    Yes, that is a sufficient fallow period for flukes.

    I would keep dosing fenbendazole every 48 hours for 1 week, and then you should be good to go.
     
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  3. Sylvester

    Sylvester New Member

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    Thank you again HumbleFish. I think one of the worst things about sick fish posts is that rarely do people post their outcome so i wanted to thank you again and also provide an update. After dosing the tank with Fenbendazole the fish begain eating within a couple of days. I then began dosing the food with fendendazole and followed that for 2 weeks in QT. I re-introduced fish to they display after 2 weeks. They have been in the display for 3 weeks and they are amazingly healthy. I joke now and tell everyone they have tapeworms because they eat like crazy.

    Looking back i lost about 6 fish to this disease. Metro did fight it and kept it at bay but eventually that stopped working. Prazi was ineffective. Months later one treatment of fenbendazole and everything is great. I still can't wrap my head around what type of parasite this was and how unfortunate this happened to me because i just got into this hobby. I was treating all my fish in QT with meds from CP, prazi, metro, kanoplex, etc... and i still had sick fish. I feel like i have gotten years of experience in just 6 months...
     
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  4. Humblefish

    Humblefish Member

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    @Sylvester Thank you for the update. If Fenbendazole did indeed fix the problem, it has to be worms of some sort. Either external or internal.

    I've been using Fenbendazole more lately to deworm, and I am finding it is superior to praziquantel.
     
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  5. Sylvester

    Sylvester New Member

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    So the worms are back. Same clown over a month later has white stringy poo and eating very little. I immediately started feeding fenbendazole medicated food for 5 days. The medication seems to help (fish eats very little in the morning and then afternoon eats much more). I assume that is because the medication if fighting back some of the parasites. Regardless, its persistent even with feeding. I transferred the fish to a 5 gallon buck and dosed with 7.6m/gallon fendbendazole. I will continue to feed medicated food while they are in QT.

    some questions.... I must have cross contaminated something in QT. Do the eggs of these parasites live outside of the fish? If so... shouldn't new hatchlings be killed in fenbendazole dosed water as soon as they hatch? How long do they stay in egg form and will drying out things like buckets and nets be enough to kill them or do i need bleach?
     
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  6. Humblefish

    Humblefish Member

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    The eggs are primarily found on the white poop, but it's not unheard of for some to get "blown off" in the flow. When this happens they scatter (and eventually hatch) anywhere inside the aquarium. This is why it can be so difficult to completely eliminate intestinal worms via food soaking medication(s). And why you have to do it for so long (2-3 weeks).

    It is also possible that what you are dealing with is actually internal flagellates instead of worms. Both produce the same white stringy poo symptom. Fenbendazole will knock flagellates back, but only food soaking metronidazole will completely eliminate these. I have been experimenting with both food soaking and dosing Chloroquine to treat internal flagellates, but results are still inconclusive.
     
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  7. Sylvester

    Sylvester New Member

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    I kept the fish in fenbendazole water in a bucket (7.6mg/gallon) for 48 hours and then transferred back to display tank. As you suggest it must have knocked back the infection because they fish are eating voraciously again despite some white stringy poo present. I made up a new food mix according to your instructions for fenbendazole but also added a scoop of metronidazole. I will report back when i have more data.

    On the brighter side i have some pieces of coral that are outgrowing this tank. I need to move them out to my larger tank but i am afraid of bringing this parasite into the new tank with healthy fish. Would a dip kill the eggs or flagellates? Or do i need a 30 day QT?
     
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  8. Humblefish

    Humblefish Member

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    A coral dip + good rinsing ought to do it. Eggs from internal parasites do not encyst (stick) the way external parasite tomonts do.
     
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  9. Sylvester

    Sylvester New Member

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    So the saga continues. I treated these guys in a medicated QT with fenbendazole and metro in the water. I attempted also feeding medicated food but they mostly rejected it. After a month of on and off eating and white stringy poo i put them back into the display just accepting the fact they may die. The both still have white stringy poo and are somewhat lethargic.. I feed medicated metro/fendbendazole food 2x per day which they mostly reject so i give a 3rd feeding of some pellets to sustain them. They have been in the display for 10 days. I was wondering if i should try levamisole in the food?
     
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  10. Humblefish

    Humblefish Member

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    Levamisole is another dewormer medication. Might be worth a shot. The clowns may find Levamisole more palatable.
     
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