Backyard Aquaponics
A place to discuss aquaponics

Hiya..

This is an open topic, not a definitive all for one answer..

It has come to my notice that there have been a lot of Fish Deaths when new fish get added to a system/pond..

The thing that people are not taking into account is that each lot of fish have their own group of germs/Bacteria that they are immune to..

Group A fish are immune to Group 1
Group B Fish are immune to Group 9

So for you to safely mix each group of Fish with the other you need to slowly get each group immunised with the others group of Diseases/Germs..
To do so takes time.. You can't just dump each lot of fish together and hope they will survive.. You can actually Kill All your Fish..

So here is what I have been told is a good method..
- The new Fish place in 6% salt water for about 30-60min then put them in a tank that is isolated from your system..
- The water they go into must not be from your Current Fish tank.. It must be totally isolated..
You want it to be virgin water..[Clean]

Now the fun begins..
- about once every 3-4 days take a small amount of water[50-100ml] from each tank and mix it into the other tank..

you need to do this over a period of weeks 5-6weeks at a minimum..

Watch the fish to see if they get stressed out or if some thing happens to them..
Over the period of weeks you are slowly getting each lot of fish used to the others own series of germs/etc..


The biggest problem is when fish from mud pond/rivers/etc get mixed in with fish from Tanks..
Mud fish have a greater number of things that they are immune to..


So if you grab fish from an unknown source then you need to follow some time of QT...
for your fish's sake..




If anyone has has an issue with this, add your 2c's worth.. The better the process we create the better it is for the Fish..


Juergen

Always good to salt new fingerlings upon introducing them.

Personally I havnt tried the above method and havnt lost a new fingerling yet.

hey..
I thought I would Post this for the simple reason that there are 2-3 current topic's Where fish have been lost due to introduction of new Fish..

Better to be safe, than Sorry..
I have actually lost Fish my self Due to not following QT myself.. and I was not happy I lost a few Fish Worth over $50 each.. Was not a lot of Fun..

Juergen

Haha. no not fun. We have just added 20 SP to our newly cycled (with goldfish) system and noticed yesterday that everyone was very subdued. Upon closer inspection we noticed the GF had a whitish pink film over their scales and the SP were "flashing" (we hadnt thought this unusual as we hadnt kept perch before). it seems that we have stressed our little mates and in our ignorance, hadnt added salt!!! Have since added (hopefully)3ppm salt but can anyone recommend a salinity and or conductivity meter??? and also, have we done all we can for the SP???

What if the fish is coming from the same source? Say i catch 10 tilapia from a source and a month later i go back and catch 10 more from the very same source?

I would still QT them.. They have been in different sources of Water for a month..

Even thou they came from the same source.. They can still have their own different group of organism's in them.. 1 month in your pond would mean that the first lot of fish have one set of antibodies[If you want to call them that]
The new fish might have had an outbreak of some bug that they have gotten used to and when you add the new Fish you also add the new bug, Which the original fish might not have had any contact with..

Sorry If I'm being broad, but I just feel it is better to take time to QT the new Fish..

As I say better to be safe than sorry..

Juergen

Thank You ill follow your advise

QT system is linked to main system normally.
However it does have the capability of being isolated to be separate.

I've always just kept new fish separated physically for a couple weeks to make sure they are healthy.

much better to be able to isolate them..

juergen

Ok i caught 8 tilapia today and made a quarantine tank, I salted them then put them in my tank when i got home. Strange 2 hours later my quarantine water which was clear is totally cloudy, i cant see the fish with my flashlight. I did put a little duckweed in there.

Anyways ill let you all know if the quarantine strategy lets my fish live
I still do have two fish in my main pond with a bit of fungus on them, hopefully it wont spread to the others?

http://www.sakoia.org/Aggressive%20Quar ... otocol.pdf

cheers

The above pdf might be applicable to "koi"... but not necessarily to freshwater fish...

And some parts.. ie.. Potassium Permanganate... are positively dangerous... and harmful.. to fish and plants...

A good clean aerated/filtered tank... salted to 1-2ppt... is all that's needed... to quarantine newly transported fish...

Salting from 3ppt to 6ppt might be needed to treat specific signs of disease... ie flashing or fin rot... (if your fish have fin rot when you buy them, ask for a refund.. and don't buy from there again)

Possible there was some sediment on the QT floor that they have stirred up?

No sediment i washed the barrel and had crystal clear water, i think it came from the fish, since the clear salted water i brought them home in also was cloudy.