Increasing of Survival Rate to Acipenser persicus by Added Clinoptilolite Zeolite in Acute Toxicity Test of Ammonia

Fish production capacity can increase by identifying environmental factors and providing an appropriate environment for the fish (Imanpoor et al, 2011). It has been established that heavy metals have wide spectrum of negative Influence on fish organisms, disrupting endocrine system, and inducing decrease of quantity and quality of offspring (Popek et al, 2009). The two principal methods of removing ammonia in water are: nitrification and ion exchange (Emadi et al, 2001). For nitrification, materials such as oyster shell, rock, sand, activated carbon, etc. are used to prepare a substrate for bacteria. Ion exchange is a process in which ions of an exchange (synthetic or natural resin) are exchanged with certain ions in wastewater. Some natural resins, such as zeolite, are used to removing ammonia (Bergero et al, 1994). One of the best zeolite to remove is Clinoptilolite (Wang and Walsh, 2000). It can be the basis of its use in aquaculture.