Rotifer Culture Crash! Help!

[ml708]

I started a rotifer culture in 4l of seawater 3 days ago and fed them PhytoGreen-M daily. I conducted a 20% water change daily as well. The culture tank is well aerated by an air pump.

Today I noticed that the water was clear yellow instead of a murky suspension of rotifers. I noticed a thin brown layer at the bottom of the tank and presume them to be dead rotifers. Upon shining a torch into the tank I noticed some live rotifer specks but they were much fewer than before.

I'm quite worried!

[julius]

Where did you get the rotifers?

[ml708]

Aquafauna

[julius]

Thanks