Hello. Been a lurker here for a bit but finally got a question. So I picked up a Majestic Angelfish. It didn’t go through quarantine….i know I know. So I get it home and put it in the tank. Looked alright last night. This morning, I see the fish is dark in color and sometimes will lay on the sand or lay against a rock under cover in a couple caves. He does this for 5 mins at a time or so but then gets up and moves around. Seems scared as it won’t leave the caves. My water parameters are 460 Ca, 8 Dkh, 8.1 ph, 35 ppt salinity. The other fish are all fine and eat like horses. The quarantine tank from the LFS runs copper and lower salinity of around 1.017. I didn’t know about the lower salinity part so when I acclimated the fish, I just did a temperature acclimation. Never had problems. My question is do angelfish sometimes lay on their sides or “sit down on sand” when stressed and acclimating? And if so, when should I begin to worry?