keeping chromis and mandarins together

[craftyx]

I recently got two gkento4t green chromis and they ate fine on the first day, but since then, they've been super skittish and won't touch any food. I've tried a bunch of stuff - flakes, pellets, zooplankton, shredded silversides, scallop, raw shrimp, mysis shrimp, and baby brine shrimp. Nothing's working. They were acclimated for 1 1/2 hours, so I doubt it's shock.

My new mandarin's being picky too, won't eat mysis shrimp or baby brine shrimp. I acclimated him the same way, 1 1/2 hours. Guess I'll have to order copepods, though I have seen him picking at the LR.

Also, can I supplement my blue linckia star fish with nori? It seems to love nori, but spits out the mysis shrimp.

Water params are:
ammonia: 0 mg/L
nitrite: 0 mg/L
nitrate: 10 mg/L

Just set up my RO unit today, was using dechlorinated tap water before, now switching to RO water. Any ideas why they're not eating?

[OceanicApe]

Getting an RO system is a great move for a reef tank. I'd definitely recommend getting copepods for your mandarin - they're notoriously tricky to keep. It's no surprise your mandarin isn't eating mysid and brine shrimp yet, they don't naturally eat them in the wild. I'd suggest getting copepods ASAP and trying to start a colony in a separate tank, though that can be a challenge. You might also want to check in with the supplier you got the fish from and ask what they were feeding them. As for the chromis and mandarin not eating, I think it's likely just moving stress - I'd give them a week and a half to settle in, but after that, I'd start getting concerned.