Here is a look at what copepods look like. There's tisbe pods, cyclops and lots of others. But you can see them up close and personal here. My tank crashed since I left for 6 months and my sister took care of it during the time. I ended up giving to my brother, but at the height of it I didn't have to feed my clowns or mandarin. They would just feed on any algae/pods that got pass the sump chambers and into the return pump. I didn't use any filter sponge or sock. I was 1st chamber cheato return, 2nd chamber crushed coral and rocks, 3rd chamber was the return to tank.