How did you acclimate them and are there any signs of disease? I know that neons are 'blackwater fish" and have no hardness in their natural water and need soft, acid water to breed. But I thought they would live in the hard stuff if acclimated slowly enough.
Hardness down is hard. "Water softeners" just exchange one ion for another. The commercial products for fish tend to cause cloudiness (you take the salts out of solution, you get particles).
The common suggestion is to use Reverse osmosis filtered or rainwater for much (60-90%) of the water.
But you could also try a hardness down product followed by micron filtration.
However, you want to make any change slowly enough not to kill more fish.
Last edited by emc7; 07-06-2008 at 03:23 PM.
Reason: spelling
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