Uptake rate and growth experiments with 30 (5-10 cm) specimens of T. maxima and T. squamosa were carried out for 21 days under different light conditions (use of HQI 150 W, HQL 125 W, fluorescent lamps
54 W, brand: Aqualine, actinic light) and different concentrations of particulate organic and dissolved inorganic nutrients (microalgae, NH4+ and PO43-).