I've been culturing phytoplankton for a while now. Just recently I've started to lose cultures or so I think I've lost them. All my bottles have settled. The phyto is at the bottom of the bottles still green and my water is clear. I have a ton of air in the bottles to keep it stirred up but they all have done the same 6 bottles now. I've read if it crashes it turns yellow. But nothing about settling out. Any ideas?
