Nick Zarlinga
Aquarium Biologist
Cleveland Metroparks Zoo
216-661-6500 ex 4485
"Fish worship... is it wrong??" (Ray Troll)
On Tuesday, July 23, 2002 12:35 PM, R. W. Wolff [SMTP:choupiqu_at_wctc.net]
wrote:
> I wonder if any can crack this problem?
>
> Last year I had this, but warm water cleared it up, as many of the koi
> sites I visit indicated it would ( koi sites are great places to find
> information about ponds, regardless of species of fish you keep).
>
> This year is happened again, but warm water only slowed the problem
down,
> but it is still occuring. The problem is not specie specific. Affecting
> sunfish, mudminnows, cyprinids, killis and maybe some others.
>
> I am not sure what causes the wounds, or if they could be from a number
of
> things. The wound, or even a bruise looking area, will open up into a
sore.
> This will then spread and become infected with a secondary cotton like
> fungus. It keeps growing until the fish is dead. The only ones to survive
> bad cases of this are a large green sunfish, and some fundulus grandis.
They
> still have small wounds where it was, but for the most part are back to
> normal.
>
> According to my stonefly nymphs, I have clean water. The water is clear.
I
> do have some algae problems, but nothing on an epidemic to indicate I
have
> tons of organic load.
>
> Its really bugging me since it just seems to keep perpetuating itself.
The
> bio load seems to be very small now that many large fish were wiped out.
I
> thought that might be the problem, but it is still occuring. I have seen
> this in local lakes this spring as well.
>
> It is not a total wipe out though, since elassoma zonatum, eastern
> mudminnow, central mudminnow, bluespotted sunfish, least darter, red
shiner,
> spotfin shiner. blackstripe topminnow , h formosa, sailfin molly, and
> possibly others have all spawned and the young are doing good. I would
> think sensitive fry with all the things that could break them open to
> infection would not even survive.
>
> I am not sure the size of my pond, but the best estimates are 15,000
> gallons. I takes about 5 hours to fill the main part from the bottom up
if I
> remember right, and using the formulas to calculate volume the best I
could
> with such an irregular shape is what I used to determine this.
>
> I am guessing it is something I probably will have to live with and hope
it
> goes away, but any input would be greatly appreciated.
>
>
>
> Ray
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/ For more information about NANFA, visit our web page, http://www.nanfa.org