Re: [RML] Ross River blueeyes

Gary Lange (gwlange at
Wed, 10 Jun 1998 23:00:12 -0500

didn't read ALL of your post correctly and had "seen" 20 degrees KH (carbonate)
which seemed to me like Rift lake hardness or worse. 20 x 17.9 = 358 ppm :-)
I was wondering what sort of strange plants could grow under that sort of
20ppm is another story. I still contend that you will see a LOT better color
with salt (4 tablespoons/gallon). Your <GH 140ppm, KH 40ppm. > is very similar
to my original conditions. The fish are a lot more impressive with higher salt
and higher temperatures. I don't know if it's the salt alone though or the
combination. I do know that it wasn't just a temperature difference as they
were kept anywhere from 22 to 27 degrees C. I would also bet that my egg
production is a lot higher under these conditions. I'm sure that I can keep
them around at lower concentrations of salt but they just aren't going to look
as pretty. Also because they are so darn pH sensitive as you had also noted if
I did keep them I would move them to a higher KH so as to avoid some of those
potential problems. Something like 7 degrees KH (carbonate hardness) or 17.9 x
7 = 125ppm :-)

> Well, you have to decide if you are displaying your fish or breeding them.
> When I'm breeding fish they don't have any plants whatsoever, just spawning
> mops. If you provide plants then you wont collect as many eggs. Most colour
> intensity comes about from spawning males so it really doesn't matter if
> they have a nicely decorated tank or not. In my opinion if they are spawning
> then the water conditions must suit them otherwise they wouldn't spawn. As
> for age you must be burning them out as I have had T'ville blue-eyes live at
> least 4 years before.

That observation was based on other blue-eyes such as furcata, tenellus and
gertrudae. For those it seems like 18 months is about the max I see for a good
reproductive life. Were your four year old Ross Rivers still producing viable
eggs after their 3rd year or were they non-producers?

This lot as I said would have to be at least 18- 24
> months old and are doing fine and I expect them to live a few more years
> yet. You should give your rainbowfishes and blue-eyes a 'winter' period
> where the temperature is low if you want them to live longer. Lower
> temperatures will give them a longer life!
> Adrian.
> ...............................................................
> Adrian R. Tappin
> "Home of the Rainbowfish"
> ...............................................................