water retention in fish

[McEve]

Does anybody know anything about this subject? What could cause problems
with water retention for a fish? More specifically, what could be the cause
for bloating due to inablity for the fish to regulate the water
intake/outlet?

Did this question make sense? :)

[Toni]

"McEve" > wrote in message
...
>
> Does anybody know anything about this subject? What could cause problems
> with water retention for a fish? More specifically, what could be the
cause
> for bloating due to inablity for the fish to regulate the water
> intake/outlet?
>
> Did this question make sense? :)
>
>


Often poor/inappropriate water conditions will cause proplems with
osmoregulation.

http://groups.msn.com/Breedingtropicalfish/osmoregulation.msnw
http://www.fishdoc.co.uk/water/osmoregulation.htm


--
Toni
http://www.cearbhaill.com/discus.htm

[Michi Henning]

"McEve" > wrote in message
...
>
> The water conditions should be spot on for this kind of fish:
> O2 = 8
> PH = 7
> Nitrate and Nitrite = 0
> No measurable hardness
> Temp = 29
> No ammonia of course

Hmmm... No measurable hardness? That would certainly increase the
osmotic pressure difference between the water and the fish, making
the fish absorb water more quickly than in harder water. I don't
recognize the species from the fry pictures, so I can't comment
on your specific fish. But, generally, very few fish exist in extremely
soft water -- the majority of tropical freshwater fish are found in
soft to medium-hard water, say 5-15 degrees. I'd check the
literature to see what is recommended for your species and
increase hardness if necessary.

Cheers,

Michi.

--
Michi Henning Ph: +61 4 1118-2700
ZeroC, Inc. http://www.zeroc.com