Thallus bits of Ulva lactuca, and Chaetomorpha antennina, were cultured in enriched seawater growth media (Walne’s media) under laboratory conditions. Weekly observation on growth rate of these algae showed that Walne's medium enhanced Daily Growth Rate (DGR) of Ulva lactuca (57.42 + 3.82 mg/d), and Chaetomorpha antennina (48.71 f 3.35 mg/d). The results are compared with the growth rate of seaweeds achieved elsewhere in in situ sea farming being carried out without addition of any nutrients extraneously.