Various pesticides are used in Nigeria and while information is available on their impact on
rats and man, little information exists on their effects on fishes. Hence there is a need to evaluate
the significance of such pesticides in order to understand the potential havoc of this pesticide if used
persistently. Other sources of aquatic pollution are effluents from laundries and garages which are
regularly discharged into inland water bodies; often resulting in mass mortality, inability to
reproduce in polluted environment and migration to safe areas. The objectives of this study are to
determine the effects and safe limit of Gramoxone or detergent on Nile tilapia (Oreochromis
niloticus) fingerlings.