author(s)
Hafeez Roy, Anam Ejaz, Ahad Hussain, Filza Ghafoor, Umer Liaqat, Arooba Naseer, Mujahid Niaz and Kaleem Ullah

abstract
Aloe barbadensis was used as a feed supplement to enhance the growth performance and act as an immunostimulant in fish. In this view, the present study was conducted to investigate the variation in growth rate and hematology of Nile tilapia under 1% and 2% Aloe barbadensis (Aloe vera) supplementation in the feed. In glass aquaria, ten fish was stocked for 2 months. Fish was feed two times daily according to their body weight with feed containing 35% crude protein. The Aloe vera was most effective at 1% concentration and gave maximum growth. The initial average weight in T₀, T_1, and T₂ was 27.2, 19.7, and 20.5 g respectively. The final average weight was 37.4, 41.7, and 40 g correspondingly in three treatments. The highest weight gain was observed in T₁ was 41.7g. Moreover, the average specific growth rate was at a peak for T₁ as compared to T₀ and T₂. Blood parameter analysis also favored T₁ to be most useful as a feed supplement. Overall, the 1% Aloe vera group showed enhanced growth and immunological parameters, while Aloe vera 2% was proven dangerous for Tilapia.