I have a lawnmower blenny, just picked up a dragonetblenny I know they eat copapods. I was just wondering should I buy some online (whats the best place to get them) or will they just grow on my live rocks I haven't noticed any. Although I don't really know what to look for.
IMO, you don't really notice copipods once the tank has its first fish in (or you wipe the glass), but there should be some in there. It really depends on the size of your tank whether you will need to get some from an outside source, I have a 5ft tank, and my mandarin (who eats copipods, nothing more) has never once looked as skinny as he did in the shop I bought him, what size is your tank?