A ? About Adding Fish That Were Shipped To The Tank

[Chad]

That happens! I can't tell you how many times I've typed a post and junked it.

 

[TwoTankAmin]

I did not intentionally junk it. I seem to have issues with the site software. i manage to do something which I do not know know how and from which I can not recover the post. I have spent an hour or two composing only to have some bug trash it.
 
I am tempted to create the post offline and then paste it , but there are then always formatting issues.
 
What I had tried to indicate was the parameter changes detailed (not in red) in my post are substantial. Some drop the listed component by over 90% if you compare the before and after numbers.
 
I also noted that by doing the daily changes in only 15 minutes sure was not a drip thing any more than it was a plop and drop. But it was closer to P&D than to a drip type process.
 
What is clear to me is there do seem to be a number of physiological changes that do not occur in an hour or a day but take longer to become manifest.
 
I also stumbled across a piece on aquaculture methods using recirculating systems that dates back to 1992. The three authors are from Auburn University, the University of the Virgin Islands and North Carolina State University. Here is a brief quote:
 
" pH
Fish generally can tolerate a pH range from 6 to 9.5, although a rapid pH change of 2 units or more is harmful, especially to fry."
 
I assume this meant 2.0 not .20.
 
Perhaps back then fish were more hardy than they are today?

 

[eaglesaquarium]

Perhaps back then fish were more hardy than they are today?

 
I guess that depends on if you are referring to domestically bred fish or wild-caught fish.

 

[Chad]

I did not intentionally junk it.

 

What I had tried to indicate was the parameter changes detailed (not in red) in my post are substantial. Some drop the listed component by over 90% if you compare the before and after numbers.
 
I also noted that by doing the daily changes in only 15 minutes sure was not a drip thing any more than it was a plop and drop. But it was closer to P&D than to a drip type process.

That is very substantial! But I suppose that's the nature of water in that it doesn't just blend without consequences nor can quantity be replaced without.

I'm not quite sure how to process the method they used in relation to the hobby-style of acclimation...I will have to ponder this a bit today.

What is clear to me is there do seem to be a number of physiological changes that do not occur in an hour or a day but take longer to become manifest.

Just a side thought...many people report their fish dying mysteriously after a week or two of being just fine...perhaps these longer term but unnoticed physiological changes are the cause?

I also stumbled across a piece on aquaculture methods using recirculating systems that dates back to 1992. The three authors are from Auburn University, the University of the Virgin Islands and North Carolina State University. Here is a brief quote:
 
" pH
Fish generally can tolerate a pH range from 6 to 9.5, although a rapid pH change of 2 units or more is harmful, especially to fry."
 
I assume this meant 2.0 not .20.
 
Perhaps back then fish were more hardy than they are today?

That is actually a fair point as we know that breeding has taken its toll. How many of us used to consider a neon a hardy fish but not so much now?

 

[TwoTankAmin]

eagle- I believe in fw aquaculture they don't use a lot of wild fish. They spawn their own stock and then grow it out.
 
The thing about mysteriously dying is that often it is not a mystery, it's just we, as fish keepers, lack the tools to determine the actual cause. I have sent a fish for autopsy only to be told there were no obvious signs of disease etc. The verdict was likely a heart attack or stroke. Animals can get these just like people.
 
Unless one has a firm diagnosis- anything is possible?

 

[eaglesaquarium]

For most species, I think you are correct, but there are some that are still wild caught, because they haven't been able to get them to breed in captivity very often - I'm thinking specifically of cardinal tetras, but I could be wrong.  There are still wholesalers who go to the rivers and catch fish specifically for the trade - I know one of them - he runs a business setting up and maintaining fish tanks (fresh and salt) for clients from NY to Washington D.C.   In his "free time" he heads off to snorkel and scuba dive in a variety of locales, and catches fish to bring back on occasion (where permissible by law).

 

[TwoTankAmin]

I was referring to the 2 unit statement. That came out of a piece on how to farm food fish, not ornamentals.

 

[eaglesaquarium]

Gotcha.