A Fishkeeping forum. FishKeepingBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » FishKeepingBanter.com forum » rec.aquaria.freshwater » General
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

Greatest dangers, life of a fish

Thread Tools Display Modes
Old November 14th 05, 01:19 AM
Daniel Morrow
external usenet poster
Posts: n/a
Default Greatest dangers, life of a fish

Hash: SHA1

Mid posted.

- --
You can find my public key at https://keyserver1.pgp.com
"Daniel Morrow" wrote in message news:...
Hash: SHA1

Bottom posted.

- --
You can find my public key at https://keyserver1.pgp.com
"NetMax" wrote in message
"Dick" wrote in message
On Sat, 12 Nov 2005 09:16:39 -0500, "NetMax"

Does anyone want to try their hand at listing the causes of death

aquarium fish, in order?

For a new tank or in novice hands
#1 water shock
#2 disease through contagions
#3 overfeeding and/or poor maintenance
#4 death from tank-mates
#5 equipment failure
#6 disease through old age

For most LFS, same order as above (and what does that say about


For an established tank, or in experienced hands, the sequence

seems to
reverse around the middle.
#6 disease through old age
#5 equipment failure
#3 overfeeding and/or poor maintenance
#4 death from tank-mates
#2 disease through contagions
#1 water shock

I'd guess #4 is higher in mbuna tanks, and #2 is higher for


I would sort by species. Black Mollies being first to die of


Live bearers after first year seem to die from assorted

Dropsy and swim bladder diseases among live bearers.

Non live bearers seem to be disease free and longer lived.

I have never lost a new fish and they all were shipped overnight
deliveries. Exception, 6 Clown Loaches arrived with heavy ich.

vendor acknowledge it was his problem. I destroyed all but 2

are doing well after over 2 years along with their 6 replacements

3 from earlier purchase.

Death due to poor handling, I fried a bunch with acid while


I have lost 2 plecos within first 6 months. No obvious cause of

I am curious why live bearers are so shorter lived and disease

They share the same conditions as the non live bearers.

When I was in the trade, I had very high losses with livebearers,

so I
complained to my importers who were also hobbyists. They told me

that I
needed to buy freshwater livebearers, not the regular fish, but

that the
freshwater livebearers were much more expensive and not always

Here is the story:

Commercial farms are always looking for inexpensive ways to reduce

amount of diseases in their system (imagine row after row of

50,000g to
200,000g ponds). Treating an entire pond of fish with antibiotics

is not
an option for them. The hotter the water is, the less bacteria will

survive, so this is one method which can be used effectively

indoors or
in greenhouses (and to a lesser degree outside). The higher

also causes the fish to 'artificially' grow very quickly, if an
appropriate diet is maintained. Salty water will also prevent

diseases, but not all fish can tolerate high levels of salt.

can, so commercially raised livebearers are born and raised in hot


Then they are shipped to the LFS where they are dropped into cold
freshwater (much colder than they are accustomed to). At this

point the
fish begin to react from water-shock, beoming particularly

suceptible to
diseases such as Columnaris. If they survive the transistion,

their live
expectancy is significantly shortened, to the point that I would

customers to raise the fry and not concern themselves with the fact

the adults only live 6 months. Their fry appear to be perfectly
acclimated to the cooler freshwater they were born into.

The cost increase was about 20%, so I immediately switched over

(this is
really not a big increase considering the mark-up on fish).

However I
had a shipment of 'regular' livebearers coming from Thailand, so I

set up
2 banks of tanks (18 x 20g tank partitions) with 100% water change

mixed in the salt levels I was told were being used (I can't recall

level, but it would be in an earlier post of mine). The difference

losses was night & day (something like 1.5%). All of my staff were

commenting on the improvement. The only problem was that I had to

them as brackish water fish, and it took me several weeks to slowly

the salt levels down. I'm not entirely sure how effective it was
reducing the salt gradually. My losses were very low, and many of

fish got sold (with instruction on salt concentration and how

quickly to
reduce it), but my statistics are limited to until they got sold,

so I
don't know if their overall life expectancy was improved.

I then started receiving 'freshwater' livebearers (primarily

which were the most affected, and I still had lots of Platys &
Swordtails, - and Mollys I always treat as brackish anyways) which

I kept
on the other side of the room. They seemed to have a very normal
mortality level, which was great.

After first year, survival of the fittest settled in. After 3

years I
see individual fish become mishappened, fungus come and go,

periods of
hiding, but month after month my stock remains stable.

I haven't bought any new fish in the last 2 years.

I'm going on 1.5 years, with one loss, and if more don't die soon,

they're going to grow me out of house & home ;~).

Sorry for the long post Dick, but you did ask, and I try to be



What I find interesting with my livebearer (my fancy guppies) is that
for the first 6-12 months they needed no salt added to thrive, and
now after that period of time (I am not complaining though and am
happy that I have the solution of adding salt for my fancy guppies to
be perfectly happy and I think healthy) they will not thrive even
close to before without salt added. I suspect my strain of fancy
guppies has gained a requirement of salt after stages of progressive
generations (i.e. the requirement is genetic). It's interesting that
my situation is the reverse of what netmax describes (i.e. fish
showing up at a store requiring salt then after reproducing in
freshwater there the descendants acclimate to freshwater with no
salt), but I must say - a little salt added to the water makes me
happy if it makes my fancy guppies thrive and be happy and I think

That is "I think healthy. Good luck all and later!"

Version: GnuPG v1.2.1 (MingW32) - WinPT 0.7.96rc1

K3uZ86U5s1Mn56UU8z0i9abuTHPRRf64y6xmQxbINPtpMWolwH Z0dppRgAYlyobT


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
New to Goldfish...having troubles. Adam Lion Goldfish 9 April 26th 05 09:44 AM
PHYSICAL symptoms of overstocking Gfishery General 26 April 15th 05 09:38 PM
Rec.ponds FAQ Snooze General 7 April 11th 05 07:04 AM
SAN DIEGO FISH CLUB SanDiegoFishes Plants 0 October 8th 04 07:16 PM
Fish per gallons? MarAzul General 17 February 1st 04 10:58 AM

All times are GMT +1. The time now is 11:07 PM.

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright 2004-2020 FishKeepingBanter.com.
The comments are property of their posters.