Newly acquired Black Diamond pair. Help!

[rolandjocson]

2 days with me, male not eating. female doing fine. offered silver sides, shrimps, blood worms. is he still adjusting? when shud i be concern? female is more active and roaming the tank. male is not stationary either. ive notice that the male breaths more hard than female.
tankmates: 1 super red arowana. 5 emperor blue hooks and the pair.
tanksize: 5x 2 x 2 with sump
water params: temp 28, ammonia 0 nitrite0 nitrate .5. ph 6.8

i turned of the lights to reduce stress

 

[Tobiassorensen]

Give them time. Ive had rays dont eat for weeks after a move. As long as hes not skinny or has an dent between his eyes id not worry to much.

 

[AnthonyFish20]

Try live black worms if he still wont eat.