To choose firefish that tend to stay in the water column, at the LFS. Approach the fire fish tank. Get the one that doesn't seem to be bothered. I used this method and got the one that just remained nonchalant when I approached. Came out within 5 mins. And within no time doesn't go into hiding at all. Also make sure there are no aggressors..It's mostly finished especially against midas blenny I believe. Sent from Singapore Reef Club mobile app