Comparison of Zeolite (Clinoptilolite) and Activated Carbon, in Ammonia Removal during Transport of Live Rainbow Trout Fry (Oncorhynchus mykiss)

Increasing the concentration of ammonia in water can cause fish death. This study was conducted to compare the performance of conditioned activated carbon and zeolite in ammonia (TAN = Total Ammonia Nitrogen) removal in a simulated transport of rainbow trout fry in 40-liter plastic bags. Hence، responses of zeolite and conditioned activated carbon in ammonia (TAN) removal at different concentrations of absorbents، i. e. 0، 5، 10 and 15 gl-1 and transportation times i. e. 12 and 24 hours and fry densities i. e. 20، 50 and 80 fry. bag-1 were compared، respectively. Both time and fish density had significant effect on TAN production (P<0. 001). A significant difference was found between zeolite and conditioned activated carbon in TAN removal (P<0. 001). The results obtained by zeolite were more satisfactory than activated carbon.