My mandarin also dislike with mysis shrimp. When I got it from LFS it already took frozen bloodworm. I continued on feeding him bloodworm. I guess he like it because it is red, just like the live brine it was trained first to take. He even takes pellet better than mysis probably because it's red.
Also a feeding room will open more options for tankmates. I make it with small plastic box, drilled an opening wide enough for it, but small enough to keep out other aggressive feeder (I have a toby puffer with him).
Also a feeding room will open more options for tankmates. I make it with small plastic box, drilled an opening wide enough for it, but small enough to keep out other aggressive feeder (I have a toby puffer with him).