Please contact Dr. Steven Wilhelm (wilhelm@utk.edu) for additional information regarding this protocol.Adapted from the original publication Morel, F. M. M., J. C. Westall, J. G. Reuter & J. P. Chaplick, 1975. Description of the algal growth media ‘Aquil’ and ‘Fraquil’. Water Quality Laboratory, Ralph Parsons Laboratory for Water Resources and Hydrodynamics, Massachusetts Institute of Technology, Technical Report 16, 33 pp.