QUOTE(whitehawk @ Oct 31 2013, 06:35 PM)
hi sifu arrow
i think all dead because didnt see them anymore
my tank setup
45cmX30cmX20cm
substrate ADA amazonia
HOB filter
DIY CO2
air stone
flora - mini java fern, flame moss, java moss, HC, US and mini Fissiden, Crypto Albida
1 big stone (already test), lava rock, wood
fauna - RCS X 15 (dead already), Neon Tetra X 6
i think the tank full cycled because almost 2 month already
i didnt check for nitrate,nitrite and ammonia
i hope all sifu can help me

Q,
-how thick is your ADA soil ?
-Did you add in any powder/liquid bacteria to aid in tank cycle?
-and did you add in any new plant/moss few days or during the time you put in the shrimp?
-Have you done few large water change prior on getting the shrimp?
-Your shrimp swim/dash fast all over your tank before drop down and died? or they keep themselves under rock/plant all the time?
-How high is your tank temperature?
Few reasons why your shrimp died,
-Tank not fully cycle, 2 mth may not be enough to fully cycle a ADA soil based tank esp without adding any bacteria additive or provide optimum
environment to speed up bacteria colonization.
-DIY co2 , if you run it for 24hrs, and have too much of it, shrimp may died of suffocation and also swing ph too low. Bacteria in filter will died off if ph go lower then 5.0.
-New Plant or plant/moss still have fert/pesticide on them (never induce any new plant/moss into shrimp without testing it first with one shrimp in a bucket) unless you got it from your friend healthy shrimp tank.
-Try use a long thin stick poke the soil to release air bubble if you haven't done that, this will help release trapped ammonia in the soil.
-Adding fert that not shrimp safe or adding stuff that contain copper.
-Anyone spray insecticide nearby your tank? like less than 10 feet away?
-Never wash properly your hand (got shampoo/oil residue on your hand when handling your tank)?