RE: Conductivity

["John N. Alegre" <listhub@libros.andante.mn.org>]

Tomoko,

IMHO, and I have gone the argue route with Wright over on the killie list
on this one more then once, conductivity can be very misleading.  GH and KH are
not always directly related to conductivity.  Conductivity is a measurement of
electron flow.  Add a very small amount of iron to the water (plant foods) and
you can have GH 2, KH 1 water with a TDS reading of 120.

Now weather the spawning is affected by the hardness (GH, KH) or the
conductivity is another argument.  Personally I use conductivity to ask the
question can I put this fish into that water.  If the change in conductivity
(TDS or microS) is greater then 30%, I assimilate.  I use GH and KH to determine
the "softness" of my water related to breeding.

By the way, borellii don't much care, they just do it.

Peace
john
 
On 25-Mar-01 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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----------------------------------
E-Mail: John N. Alegre <listhub@libros.andante.mn.org>
Date: 25-Mar-01
Time: 16:16:40

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