THE IMPACT OF THE ZEOLITE ON THE GROWTH OF THE COMMERCIALLY GROWN RAINBOW TROUT

This study evaluates the impact of zeolite supplementation in feed on the growth and condition of commercially grown rainbow trout. Over 12 weeks, 600 rainbow trout were divided into three groups (200 fish per group) and reared under standardized conditions. Group A received only commercial feed, while Groups B and C were supplemented with 1% and 2% zeolite, respectively. Growth performance and Fulton’s condition factor were assessed biweekly on eight occasions. The greatest growth was observed in Group B, followed by Group C, with the lowest growth in Group A. Fulton’s condition factor decreased as fish mass and length increased, ranging from 1.34 to 0.91 in Group A, 1.34 to 0.84 in Group B, and 1.12 to 0.96 in Group C. Notably, Group C demonstrated the best final condition factor (0.96) and feed conversion efficiency. Zeolite supplementation, particularly at 1%, significantly enhances growth performance in rainbow trout, while 2% supplementation improves condition factor and feed efficiency. These findings highlight zeolite's potential as a beneficial feed additive in aquaculture systems. Further research is recommended to optimize dosage and evaluate long-term effects.