“…However, a general medium such as the Oxoid nutrient agar should give maximum results (Overbeck, 1965) . These results probably underestimate the total numbers of bacteria present (Kuznetsov & Karzinkin, 1931, Waksman, 1934Jannasch, 1953Jannasch, , 1958Jannasch, , 1963Jannasch, , 1967Kuznetsov, 1959;Prokesova, 1963 andWood, 1967 Generally, a large algal population was invariably correlated with an increase in bacterial numbers as found by other workers (Overbeck, 1965(Overbeck, , 1967(Overbeck, , 1968Overbeck & Barbenzien, 1964 ;Anagnostidis, andOverbeck, 1966, Olah, 1971) . This was particularly true with the aerobic bacteria .…”