I think having more of them will make them more brave. I got about 23 pieces of cl inside my tank and they are always coming near the tank glass swimming up and down the glass. Maybe the type of food I fed can also contribute to making them bravier. I only fed them FBW hence as these FBW go into the tank, they are push around the tank by my pump hence making the cls chasing after them (I setup a stronger than required pump system for my tank to give them a better current flow). Last time I tried giving them sinking pellets but notice that they only move more around the bottom area of the tank. Maybe tank mates also contribute some factors. I got 8 SD inside who will really give chase to the FBW. Hence the cls will have to move faster than the SD if they want to have their meal. Those are just some of my thinking and may not be really true. Anyway, you will never know if you try right?
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