Strange Invert. in my tank! - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 03-07-2006, 01:30 AM Thread Starter
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Strange Invert. in my tank!

I noticed a few of these very small, almost saltwater like inverts in my tank today. They are very small, about a cm in size. They have a long foot and 5 tentacles off of the foot. White in color. They have attached themselves to some of my plants, driftwood, and the glass...

What are they!?
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post #2 of 11 (permalink) Old 03-07-2006, 01:34 AM
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post #3 of 11 (permalink) Old 03-07-2006, 02:18 AM
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Is hydra dangerous to fish or plants?

or is it a good source of food for them? if its a good source ofr natural food, how do you get them?
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post #4 of 11 (permalink) Old 03-07-2006, 05:00 AM
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Originally Posted by Solace
or is it a good source of food for them? if its a good source ofr natural food, how do you get them?

I just glanced quickly over that link above...and from memory, hydras are a pest...I am not sure how much they damage things, but I say read that article if you are interested.
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post #5 of 11 (permalink) Old 03-07-2006, 05:36 AM
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Hydra can catch and kill small fry.
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post #6 of 11 (permalink) Old 03-07-2006, 06:56 AM Thread Starter
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Yup, that's them! Can they catch and kill my discus? Is there anyway of killing it without killing my shrimp? Currently there are no fish in the tank...what should I do!
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post #7 of 11 (permalink) Old 03-07-2006, 08:23 AM
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I know that the three-spot gourami (Trichogaster trichopterus) and the paradisefish (Macropodus opercularis) will both eat them. Hydra is sensetive to salt. 0.3-0.5% salinity is enough. I dont think its a problem for bigger fish but they can reproduce rather quickly.
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post #8 of 11 (permalink) Old 03-13-2006, 06:35 PM
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I've got these things everywhere, and they're quickly becoming a nusance. I have both the white and green variety. Any idea what else will eat them, maybe something that won't eat my shrimp?
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post #9 of 11 (permalink) Old 03-13-2006, 07:05 PM
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Gourami's will eat them in no time. I think I got Gold Gourami's but I think most if not all of them are hydra eaters.

Hydra are really not that big of a deal unless you are breeding fish.

-Craig
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post #10 of 11 (permalink) Old 03-21-2006, 06:48 PM
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They are in my shrimp and fry tanks, a big problem in both... Too bad a gourami would do more damage than the hydra....
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post #11 of 11 (permalink) Old 03-23-2006, 09:46 PM
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I had a bunch in a tank once, and the guppy fry in there cleaned them up in a few days.

Join a fish club.Don't have one near by? Start one.
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