Vol. 4, Issue 3, Part B (2018)

Abstract
The present study was carried out for 109 days from 6^th November, 2016 to 23^rd February, 2017 to assess how tomato and fish production respond to calcium supplement in aquaponics. Tilapia (Oreochromis niloticus) was released at the rate of 10 fish/16 L water tank and two tomato saplings were planted in each replication. As the source of calcium, chicken egg shell powder was added in T₁ (1kg/decimal) and T₂ (1.5kg/decimal) and T₃ was control. The daily growth rate and survival rate were 1.68±0.009, 1.59±0.016, 1.6±0.03% and 66, 70, 60% in treatment T₁, T₂ and T_3, respectively. The higher production of tomato (73.58 tons/ha/109 days) and fish (295.03 tons/ha/109 days) T₁ signifies the potential of egg shell powder as source of calcium in addressing disease problem in tomato.