PENGARUH TITIK OPTIMAL KONSENTRASI NaOH DAN CaCO3 TERHADAP KARAKTERISTIK AGAR RUMPUT LAUT Gracilaria gigas THE EFFECT OF OPTIMUM POINT OF NaOH AND CaCO3 CONCENTRATION TO AGAR CHARACTERISTICS OF Gracilaria gigas SEAWEED - ATHALIA, VANESSA (2019)