A 56-days growth trial was conducted in happaunder greenhouse culture system to examine the effects of different added vitamin C on growth, feed utilization and survival rate of Nile tilapia (Oreochrmis niloticus) fingerlings with average initial weight of 8.12±0.02 g. Five treatments T1 control added dry vitamin C, T2 mix Vitamin C with water, T3 mix vitamin C with oil, T4 spry added vitamin with water and T5 spry added vitamin C with oil. The levels of vitamin C (70 mg/kg) and their combination were used to prepare diets used in nine experimental treatments with three replicates. Based on the results of this study, it can be conclude that addition of vitamin C with oil spry added was the best in terms of growth performance, feed utilization and survival rate.