THE APPLICATION EFFECTS OF IRANIAN NATURAL ZEOLITE IN WATER ON GROWTH PERFORMANCE AND NUTRITIONAL PARAMETERS OF ANGEL FISH (Pterophyllum scalare) Farzad Ghiasi*, Mohammad Sedigh Jasour, Hossein Shamsi Department of Fisheries Science, Faculty of Natural Resources University of Kurdistan, Sanandaj, Iran fgh@uok.ac.ir Introduction Clinoptilolite is probably the most abundant zeolite, word wide and it formed chiefly from the alteration of silicic volcanic ash by pore water during digenesis (Ghiasi et al., 2011). The exchangeable cations of a zeolite are only loosely bonded to the tetrahedral framework and can be removed or exchanged easily by washing with a strong solution of another ion (Mumpton and Fishman, 1999; Bergero et al., 1994). Obradovč et al. (2006) suggested that the usage of natural zeolite as a corrector of environment condition in water of the rainbow trout ponds improved the growth and nutritional parameters of fish. The present investigation was designed to study the application effects of Iranian natural zeolite in water on growth performance and nutritional parameters of angel fish (Pterophyllumscalare). Material and methods Natural Iranian zeolite obtained from semnan mine. The experiment is carried out within 360 Fish (initial weight 1 g), divided in 12 aquariums include 1: control (non-use of zeolite) 2: using 4 g/l zeolite 3: using 10 g/l zeolite 4: using 15 g/l zeolite, with 30 fish in each aquarium. The aquariums size was 75 Litter. The experiment lasted for 30 days without water flow and with continues aeration. In every week the samples were prepared for measuring the growth and nutritional parameters, according to the data with which the angels’ growth and feed consumption are measured, the feed consumption has been noted every days,and the data were analyzed by SPSS. Result and discussion Results showed that the weight in treatments of10 & 15 g/l zeolite compared with 4g/l zeolite and control group significantly increased (p<0.05; Table
