09-20-2007, 06:49 PM
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Dojo loach mystery...
I am new to your forums and have a reoccurring issue with a dojo loach that is perplexing me. I have the dojo in a 55 gallon tank with water parameters at:
Ammonia 0 ppm
Nitrites 0 ppm
Nitrates 10 ppm
All other fish in the aquarium are behaving normally. Recently though I noticed that from time to time this dojo would lose his/her ability to swim and will either float on his/her side or back and swim slowly around the tank with apparent difficulty. I know sometimes dojo's can clown around but something is clearly wrong. I isolated this fish thinking maybe a swim bladder issue, withheld food for 5 days, and treated him/her with maracyn. He/She appeared to improve and was quite frisky by the time I reintroduced him/her back in the main tank. This was about a week ago. The dojo has since been appeared fine but tonight is now showing the same symptoms. Externally I noticed his/her "vent" (I think this is the term for where their waste is excreted) is protruding more than the other dojo's and occasionally he/she swims to the top of the tank, gulps some air, and a bunch of bubbles come out of the vent.
I don't know what is going on here and am not sure how to proceed. I have read fish can become constipated and am not sure if this is so in this case. If it is I read you can give Epsom salt baths? I have looked this fish over carefully and cannot find any sign of external parasites or other issues.
Any info would be helpful and I can try and take a picture if this might help anyone.