Possible causes for Yamato shrimp death.

["Wah" <tswah at mbox3_singnet.com.sg>]

Hello everyone,

Till date, I think almost 100 Yamato shrimps have died in my hands. I cannot
find a reason for their death. Many batches die after I did very simple
things like changing water, increasing CO2 from 1 to 2 bubble per second,
increasing traces from 5ml to 7ml. Are they really sensitive to changing
water conditions. I am really clueless.

Tank parameters.
pH 6.5
KH 4
GH 1
Nitrate about 10ppm
Phosphates unknown (should be almost 0 I think)
Temperature 27 degree celsius

Any help is appreciated.
TIA

Wayne Wah from Singapore