Dallas Weaver, Ph.D.
deweaver at gte.net
Mon Nov 5 11:15:51 EST 2001
in article 9rkml0$lpi$1 at mercury.hgmp.mrc.ac.uk, Dr Peter Cattin
at p.cattin at auckland.ac.nz wrote on 10/29/01 2:53 PM:
Zebra fish are very tolerant to a wide variety of water conditions and
will spawn up to about 2000 ppm TDS and as low as 150 ppm
within a temperature range of 21 to 29 C. If you are using a recycle
system, copper will be removed in the sludge. The amount of
copper which you will normally get into the water from cu pipes
usually will not create a problem with high alkalinity water (Cu
toxicity is a function of alkalinity). Recycle systems with lime
addition and very little water exchange will not have any copper
In high intensity recycle systems it is easy to add very significant
amounts of cu in the feed to the system (100's of ppm) and never
see any significant amounts in the water.
Dallas E. Weaver, Ph.D. <deweaver at get.net>
5542 Engineer Dr.
Huntington Beach, Ca 92649 USA
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