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water parameters for dry and wet season

Posted: Fri Feb 10, 2012 1:08 am
by lzebra
I'm wondering what the actual water conditions are for the xingu during dry and wet season are? Anyone here have knowledge about the ph, gh, kh, tds parameters?

Re: water parameters for dry and wet season

Posted: Sun Feb 12, 2012 2:11 am
by TwoTankAmin
Somewhere here I posted the closest thing I had seen to the params. I got them from a link in a thread on PC. Basically the reading were taken in the Xingu near Altamira which is s bit upstream from where zebras have been collected in the big bend. The readings were taken once for each season but they were taken 12 years apart by two different people. This post was made on in 2000. The conductivity readings translate to TDS of approximately 14 for the low and 80 for the high.
Stawikowski recorded the following conditions for the Xingu near Altamira in September 1988 (low water): pH 6.5, 1º dGH, 1º dKH, e.c. 120µS/cm @ 32ºC (90ºF). Lacerda measured the Xingu in about the same location in March 1996 (high water) as follows: pH 6.7 - 6.9, e.c. ~20µS/cm.
The water temperature was cooler, probably around 80ºF. The upper Xingu was studied by Lowe-McConnell (this is the paper Pete mentions) and she reports similar hardness & conductivity values. The pH was considerably lower, pH 5.0-5.1, but this wasn't in the main channel.

Re: water parameters for dry and wet season

Posted: Sun Feb 12, 2012 10:43 pm
by lzebra
Thanks twotanks. Interesting info
In your experience what parameters of temp, ph, tds, gh/kh do u keep your zebs for dry season and then wet season to induce spawning.