Temp swing is day an night. Yes all fish come from the same LFS, who in turn get them from the same wholesaler. I acclimate by putting new fish into a container with original water -half. Then over a period of 60min I add water from the tank at around 20ml every 15min. Then I'll keep only Atenic lighting on. Believe it or not I'll only buy my fish at night, call me anal.
Sufice it to say I'm through with Clown Gobys. At the same time I got the Clown I also bought a White Ray Prawn Goby, who's doing great! Next week I'm expecting a pistol shrimp, hopefully they'll pair off.
Thanks ya'll.