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  1. 06-12-2012, 05:58 PM #1
    Cactus_Tree's Avatar
    Cactus_Tree
    Cactus_Tree is offline Junior Member Guppy

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    Default Hydras in the tank...

    Hi!
    I have a cute little blue crayfish, and today I noticed the aquarium is full of tiny weird wide creatures... After good long online research, I found out they are hydras... The one thing I couldn't find an answer to is whether they are dangerous to the crayfish? And what can be done to get rid of them? Help...
    Thank you!
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  2. 06-12-2012, 07:08 PM #2
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    How little is your cray?

    Apparently hydra can catch fry and small adult fish. I doubt your crayfish will have a problem .. But just in case , the link below provides a few ideas on how to get rid of them. Hope this helps you out.
    Apparently hydra is a pest.
    http://freshaquarium.about.com/od/pr...Pest-Hydra.htm
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  3. 06-12-2012, 08:30 PM #3
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    Thanks!
    Those Hydras look like Hattifatteners from the Moomins! haha
    I wonder how they got to my aquarium...
    I hope you're right, and it's not a problem, because I don't think I can get rid of all of them efficiently. But I'll give the tank a good clean this weekend!
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  4. 06-13-2012, 12:00 AM #4
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    Did you buy a live plant for your tank? Or driftwood , some sort of new decoration they could have came on?

    Hopefully someone more experienced with this chimes in but I do believe that they can reproduce quickly from what I have been reading..

    If someone more experienced doesn't answer you maybe try posting a new thread in the general aquarium or beginner part of the forum hopefully someone will be along shortly though, and goodluck getting those suckers out!
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  5. 06-13-2012, 12:09 AM #5
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    I had them years ago once...

    Personally i think they are pretty cool... I had fry in my tank in with them no problem.

    Fish will usually eat them and they tend to dissapear after a while if the tank is extra clean.

    Nothing to be worried about...
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  6. 06-13-2012, 07:05 AM #6
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    I got a plant a few months ago, but I also got rid of it about two months ago (cray chopped it all off)... And those hydras appeared only two days ago! (I think they're really cool too!).
    I also noticed I have some white moving things on the tank walls and filter, they look like dust or something, but I'm guessing they're some kind of a worm? Any ideas?
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  7. 06-13-2012, 11:14 AM #7
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    Planaria. Most likely from overfeeding. If you have gravel in your fish tank, vac it daily to get rid of any rotting food. Unless that's the Hydra as well?

    I would get rid of any plant that had Hydras so it isn't taking over the tank. Perhaps a mild bleach dip may kill it but if allowed to over run the tank, you will have a problem.

    http://freshaquarium.about.com/od/pr...Pest-Hydra.htm
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