Seaweed has various genera, one of which is the Caulerpa genus or known as sea grapes. This research aims to determine the highest content of vitamins A, C, and E in Caulerpa lentillifera between cultivation and nature. The HPLC content test results detected in cultivated C. lentillifera were only vitamin E with a content value of 0.97 mg/100 gr, while vitamin A and vitamin C could not be detected. The HPLC test results for vitamin content in C. lentillifera from nature detected vitamin A with a value of 57.07 mg/100 gr and vitamin E 0.86 mg/100 gr, while vitamin C content could not be detected. Air quality parameters in cultivation ponds range from 27-31℃, pH 7.9-9.7, salinity 29-33 ppt, nitrate 0.1-2.5 mg/l and phosphate 0.1-2.0 mg/l. Parameters in the water of the Serangan area range from temperature 28-31℃, pH 9.0-10.3, salinity 30-32 ppt, nitrate 0.1-0.2 mg/l, and phosphate 0.1-0.5 mg/l.
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