Abstract This study aimed to analyze the optimal combination of temperature and light for growth quality Kappaphycus alvarezii seaweed. used a factorial completely randomized design (CRD factorial) consisting 2 factors (temperature light) with three replications, which included 28, 31, 34 °C 50 100 photons (µmol m −2 s −1 ). The test object was seaweed seed weighing g. results showed that S28C1...