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Re: Conductivity



Tomoko,

Staeck wrote a paper on A. borellii and all of the collecting localities that
he sampled throughout its range. He shows a table of water values that range
from pH 5.5/<10S/cm to pH 7.9/150S/cm. These values are for basically the
same location (So Borja, Brazil & Santo Tom, Argentina in the Rio
Uruguai/Uruguay drainage). Both the high and low pH/S values were taken
during the winter (July), only 2 years apart. Most of the more northern
sampling sites on the upper Paraguai/Paraguay had values between pH 6.9 & 7.3
and a conductivity ranging from 15 - 100S/cm (most <60S/cm). I would
imagine that slightly acid water with a conductivity around 100S will do
just fine.

Mike Wise

Tomoko Schum wrote:

> Hi everyone,
>
> I need some advice on conductivity for breeding
> apistos.
>
> I am presently cycling a new tank (20 gallon long)
> intended for breeding apistogramma borellii. Yes, I
> found the females (thanks to all of you who gave me
> leads) and they are coming soon!!!.
>
> I understand that A. borellii are not as fussy about
> water softness and conductivity as some other difficult
> to breed apistos.  However, I don't know at what
> conductivity level they can tolerate when it comes to
> spawning.  I hope some of you can help me figure this
> out.
>
> I have mixed 8 gallons of DI water (conductivity: 0.512
> microS/cm) with tapwater (conductivity: 199 microS/cm)
> making up the rest.  I added some plants in the tank
> for shelter/looks.  The plants add some complication to
> the situation.  I normally add some fertilizer to water
> column which no doubt increases the conductivity.  My
> heavily planted 75 gallon has a conductivity value of
> 345 microS/cm.  The fish load in the tank is high and
> it is also amended with liquid fertilizer for the
> plants.  I suppose I could do without fertilizer.
>
> Any help will be greatly appreciated.
>
> Tomoko
>
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