Well... I may have killed all my pods. And I had a very healthy collection going.
With my rotifers, I would literally dump a liter of nanno into the tank, and within a week, the water was clear.
I have been feeding smaller amounts of tetraselmis and isochrysis to my pod culture, and things were moving along so well. Then, last thursday I split all my phyto cultures and dumped a large amount (probably one liter) of isochrysis into the tank.
Four days later, there is no activity. I spoke with Adelaide tonight, and it seems that I am guilty of pod geoncide.
So what did I do wrong?
Well, apparently pods need higher dissolved 02 levels than rotifers do. So, I smothered them. Additionally, Copepods are constantly recycling wastes in the tank that rotifers don't pay any attention to. So less food is needed.
So yeah, I am a pod killer. But I have already lined up a new, healthy starter culture to begin again with. I'm posting this here so someone else doesn't make the same mistake.
Cheers...