It's quite hardy, but the feelers will just drop off if condition is not right. But dun pluck out if feelers drop cos might grow new one.
Since still cycling stage, just throw in 1 market prawn n on water circulation. Most likely cycling not started. Lights n skimmer no need on. N just leave it untouched for 2 weeks first.
Comy n Jacky, kh up, ca down. Rite? Correct me if I'm wrong n small pico tank, no need to bother with mg I guess