Chase31's 50 starfire aquascape reef

[Chase31]

Well bad news already.... I transfered all my rock and fish lastnight and woke up to 4 dead fish 2 dead snails and all my hermits cruzing around fine..... What could this be I tested my levels 5 mins ago as follows
S.G. 0.025
Ammonia 0.0-0.1
Nitrite 0.0-0.1
Nitrate 0-5
All closer to the 0 range using new nutrafin test kits
All this rock should be cycled properly as it was maintaining 4 fish in my other tank and was only out of water for less then 10 seconds.
Could it have been my acclimation process? Dripped for 35 mins at a couple of drops a second.
Thanks in advance