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Re: [Killietalk] Decapsulated brine eliminate Hydra? (wasRe:Artemia price comparison) (was Re: Hatching decappedartemia)
Ok.
Consider this. In 20 years of keeping fresh water and saltwater fish, the
only tanks that have had Hydra blooms are those tanks which have received
live brine shrimp. There is no confusion for which tanks get what, for the
only tanks to get bbs are the tanks with only babies fish in them. Many of
the tanks I have cared for have been fed live daphnia from outdoor ponds
which have hydra from time to time. These tanks have never showed a bloom of
hydra. Lucky, I know, but relavant for my argumant.
Saltwater hydra, which is seen often on live rock, can withstand hours of
fresh water dips and can even further survive permanently. I took a piece of
old Jakarta live rock and put it in clean, pure fresh water to identify some
of the animals living in the rock as an exercise for a class I mentored a
few years back. After six plus weeks of soaking, all basic life was recorded
as dead, except, yep, the hydra.
Markus
As Arthur C.Doyle quated for Sherlock, "When you have eliminated all which
is impossible, then whatever remains, however improbable, must be the
truth".
And, as been said on this very list, "Time for my flame retardent
underwear!!"
----- Original Message -----
From: "Barry Cooper" <bjc3 at centurytel_net>
To: "killifish discussion list" <killietalk at aka_org>
Sent: Thursday, February 23, 2006 7:27 PM
Subject: Re: [Killietalk] Decapsulated brine eliminate Hydra? (wasRe:Artemia
price comparison) (was Re: Hatching decappedartemia)
> Sorry Markus, but I agree with Gerry. The idea of Hydra coming in on
> brine shrimp cysts has been raised before but is pretty much
> discredited. It is very unlikely that a species that grows in a salt
> lake would become established in a fresh water tank. Most people
> attribute blooms of hydra to the bbs providing food for them. At least
> personally I don't accept the theory of hydra coming in on bs cysts.
>
> Barry
>
> Barry J. Cooper
> Sweet Home, OR 97386
>
>
>
> Markus Brown wrote:
>
>>Gerry
>>
>>I appreciate your opinion, but for me, the only vector can be brine shrimp
>>eggs. I have never had hydra in any baby/adult tanks that receive no bbs.
>>When I feed bbs to my fish, there is NO left over. So few bbs are added to
>>the tank, they are consumed within minutes. If I want a much longer
>>feeding,
>>I use Moina or sifted daphnia.
>>
>>As far as being in my source water, that would be very unlikely. To begin
>>with, my source water is filtered through a 5 micron prefilter and two
>>carbon block filters, a 75gal/day R.O membrane and then a D.I filter bed.
>>My
>>tap is very soft, with almost no mineral content, aside from a minimal
>>amount of caco3. Hydra do not last in soft water in my experiance. They
>>reproduce only so long and then die off. I messed around with this
>>phenomenon a wile back when I found them in a couple of a baby tanks. I
>>added a few dozen hydra to static water, with a smattering of bbs. Even
>>with
>>the addition of bbs daily, they deceased in a few weeks. I know this is
>>rather "ghetto" of an experiment, but it was telling of my previous
>>thoughts.
>>
>>I do wonder if they are added to the baby tanks along with the un-hatched
>>brine? That's why I asked if decapsulating them and better separating the
>>eggs, from the hatched naupolii was better for avoiding Hydra.
>>
>>Markus
>>
>>----- Original Message -----
>>From: "Gerald Rosenbeck" <grosenbeck at hotmail_com>
>>To: <killietalk at aka_org>
>>Sent: Thursday, February 23, 2006 5:15 PM
>>Subject: Re: [Killietalk] Decapsulated brine eliminate Hydra?
>>(wasRe:Artemia
>>price comparison) (was Re: Hatching decappedartemia)
>>
>>
>>
>>
>>>I seriously doubt if the hydra infestation is coming from the brine
>>>shrimp
>>>eggs. More likely your source water or very minor infestations in your
>>>fish
>>>tanks. All that food , they multiply like craze.
>>>
>>>Gerry
>>>
>>>
>>>
>>>
>>>>From: "Markus Brown" <thefishbiologist at charter_net>
>>>>Reply-To: killifish discussion list <killietalk at aka_org>
>>>>To: "killifish discussion list" <killietalk at aka_org>
>>>>Subject: Re: [Killietalk] Decapsulated brine eliminate Hydra?
>>>>(wasRe:Artemia price comparison) (was Re: Hatching decappedartemia)
>>>>Date: Thu, 23 Feb 2006 16:18:45 -0800
>>>>
>>>>Here is another question for this thread:
>>>>
>>>>Does decapsulated Brine Shrimp eliminate the spread of Hydra?
>>>>
>>>>I have almost never seen Hydra in any tanks other than those I feed baby
>>>>brine too. Hasnt been a real problm toward my fish, just one more thing
>>>>I
>>>>have to wipe off the glass;)
>>>>
>>>>Markus
>>>>
>>>>----- Original Message -----
>>>>From: "wm crash" <wm_crash at hotmail_com>
>>>>To: <killietalk at aka_org>
>>>>Sent: Thursday, February 23, 2006 3:28 PM
>>>>Subject: [Killietalk] Artemia price comparison (was Re: Hatching
>>>>decappedartemia)
>>>>
>>>>
>>>>
>>>>
>>>>>Using the advertised numbers of brineshrimpdirect it works out that
>>>>>decapped
>>>>>brine eggs cost 5.2 times more than normal brine eggs to produce the
>>>>>
>>>>>
>>>>same
>>>>
>>>>
>>>>>amount of feedable artemia.
>>>>>
>>>>>Assumptions made:
>>>>>- premium grade artemia has a 70% yield due to non-ideal conditions and
>>>>>due
>>>>>to the fact that not all hatched artmia are harvested and fed
>>>>>- decapsulated artemia has 100% yield because the ones that don't hatch
>>>>>get
>>>>>mixed with the hatched ones and in general, fry will eat them anyhow
>>>>>
>>>>>
>>>>when
>>>>
>>>>
>>>>>mixed in with the hatched ones
>>>>>- shipping cost was not factored in
>>>>>- price for the 1lb can was used for normal eggs, and for the 400mL
>>>>>container for decapped eggs
>>>>>
>>>>>take care,
>>>>>wm_crash, the friendly hooligan
>>>>>AKA #08840, SAA #162, SVAS #120, HOOLIGAN #1
>>>>>San Jose, CA
>>>>>
>>>>>
>>>>>Join the AKA at http://aka.org/modules/tinycontent0/index.php?id=9
>>>>>Archives are at http://fins.actwin.com/killietalk/
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>>>>>
>>>>>
>>>>>
>>>>Join the AKA at http://aka.org/modules/tinycontent0/index.php?id=9
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>>>>
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>>
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>>
>>
>>
> Join the AKA at http://aka.org/modules/tinycontent0/index.php?id=9
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>
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