Re: [Killietalk] RO water, Hardness, Conductivity, TDS, and other related topics http://www.water-research.net/totaldissolvedsolids.htm

["Bill Shenefelt" <william_shenefelt at verizon.net>]

My understanding is that it is the egg fertilization that suffers not eggs 
already fertilized.  If the water is hard, the egg develops a shell 
impenetrable by the sperm.  Storing picked eggs in harder water is not a 
problem if the fish spawned in soft water but not the reverse. For 
particularly sensitive species, spawning may be also discouraged by hardness 
of the water.  For most middle of the road Aphyosemions, if you get a lot of 
white eggs, the water is too hard or you have a bad male.  If it happens 
with a lot of different pairs, it is probably the hardness in the breeding 
tank, not the male.
Bill Shenefelt
http://sheneskillies.com 


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