Finally, for #ThesisThursday, updates on my student's project. We ran Lake Ontario and Lake Erie water yesterday for chlorophyll content and both measurements failed!! I've never had this happen. It's not a problem with #periphyton, only #phytoplankton. But this is twice now the normally stable rxn hasn't worked.

So, it's time for plan B - ash-free dry mass (AFDM). This is a comparatively crude measurement, but it may be all we can get! Will try the chl one more time......