So I had a nice amount of copepods when I added some caulerpa. But they have seemed to start disappearing a lot, more so, the smaller ones. When I do my top off, I poor the water right into my return pump section so it mixes quickly. But ever so often I'll spill some fresh water into the fuge. Would that be enough to kill smaller copepods? I have only seen two copepods in my DT, so I don't think that many little ones could have hitched a ride up and not be noticed.