are hydra a problem? - The Planted Tank Forum
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post #1 of 27 (permalink) Old 02-14-2012, 05:05 PM Thread Starter
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are hydra a problem?

I have a ton of hydra in one of my tanks. Are these things bad in any way? If they are, what is the best method to control them?

I even have duckweed in my water bong!
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post #2 of 27 (permalink) Old 02-14-2012, 06:08 PM
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Are these like hydroids in salt water tanks? If so then they can sting inhabitants.
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post #3 of 27 (permalink) Old 02-14-2012, 06:11 PM Thread Starter
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Originally Posted by mallorieGgator View Post
Are these like hydroids in salt water tanks? If so then they can sting inhabitants.
I am not sure. I know very little about them. They look like little polyps.

I even have duckweed in my water bong!
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post #4 of 27 (permalink) Old 02-14-2012, 07:46 PM
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Hydra are bad. At the least they will stress out any fauna by stinging them. At worst, smaller fauna can die.


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post #5 of 27 (permalink) Old 02-14-2012, 07:56 PM Thread Starter
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Hydra are bad. At the least they will stress out any fauna by stinging them. At worst, smaller fauna can die.
How can I get rid of them?

I even have duckweed in my water bong!
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post #6 of 27 (permalink) Old 02-14-2012, 08:04 PM
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Dog de-wormer sold at most petsmarts under the name SafeGuard does it.

https://www.plantedtank.net/forums/sh...bendazole.html

That thread talks about dosing with it. I have used it before with good success as I believe the massive hydra outbreak was killing my baby crystals and why I had no babies growing up for about 4 months.

20g platy, , 2 x 10g shrimp, 3 x 20g shrimp, 7.5g shrimp and 1 great dane/mastiff puppy.

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post #7 of 27 (permalink) Old 02-14-2012, 08:23 PM
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Any dog dewormer with panacur in it will work great. only thing it will harm are nerites so remove them before you use it. It will also wipe out any annoying planeria you may have in your tank.
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post #8 of 27 (permalink) Old 02-14-2012, 08:33 PM Thread Starter
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Will these chemicals harm my plants or my shrimps?

I even have duckweed in my water bong!
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post #9 of 27 (permalink) Old 02-14-2012, 08:35 PM
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Will these chemicals harm my plants or my shrimps?

Nope. To be honest I forget the amount I dosed but if you search on here or google I imagine you can get a good dosage chart. I was scared (heavily planted and a lot of RCS) but nothing was harmed and the hydra and worms were gone within the week. I did this like 3 months ago and none have reappeared.
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post #10 of 27 (permalink) Old 02-14-2012, 08:37 PM
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I even watched some of the shrimp eat some of the white dewormer powder and got totally freaked they were gonna die but I didn't lose any.
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post #11 of 27 (permalink) Old 02-14-2012, 08:56 PM Thread Starter
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I even watched some of the shrimp eat some of the white dewormer powder and got totally freaked they were gonna die but I didn't lose any.
Excellent, thanks!

I even have duckweed in my water bong!
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post #12 of 27 (permalink) Old 02-14-2012, 09:33 PM
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Liam sells panacur on his site for $3. I bought some bc I heard hydra will kill your baby shrimp and I have a couple berried shrimp.


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post #13 of 27 (permalink) Old 02-15-2012, 01:18 AM
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I used a similar deworming medicine for humans with flubendazole, and it didn't kill any shrimp, it did kill my Nerites though..
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post #14 of 27 (permalink) Old 02-15-2012, 01:26 AM Thread Starter
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I used a similar deworming medicine for humans with flubendazole, and it didn't kill any shrimp, it did kill my Nerites though..
Other than 4 otos and a bunch of plants, the only other inhabitants are cherry chrimps and malaysian trumpet snails, I already moved out my nerites. (They were laying eggs on my nice crypts!)

I even have duckweed in my water bong!
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post #15 of 27 (permalink) Old 02-15-2012, 01:48 AM
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Fun fact about hydra that I learned from studying my notes today over mutualism in animals.

"The green algae are found in the layer between the ectoderm and endoderm (of the hydra). Algae furnish oxygen to the hydra and the hydra produces carbon dioxide as
well as nitrogenous waste products (ammonia) for use by the algae."

-Mike
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