CALCIUM CARBONATE (CaCO3) IN THE WATER SALINITY TO THE GROWTH OF SEEDLING CATFISH (Pangius sp.)

The development of technology and production systems in the field of aquaculture is one of the primary solutions for increased production efforts to cope with the presence of fishing is mainly about fish seed availability constraint of catfish. Seed quality improvement through lime addition catfish strived for the availability of minerals in the water supply and maintenance of media in salinity 4 g/L which aims to suppress the level of employment of the inaugural thereby reducing energy used for osmoregulation and can be allocated to growth of catfish. Catfish seed size used 2.69±0.04 cm and weight used 0.08±0.01 g. Aquarium used measuring 30 x 15 x 25 cm by as much as 15 units and filled water in salinity 4 g/L as much as 9 litres per unit and added lime CaCO3 according treatment that is K (0 mg/L CaCO3), A (150 mg/L CaCO3), B (200 mg/L CaCO3), C (250 mg/L CaCO3) and D (300 mg/L CaCO3). For research, fish are feed with levels of a protein 28 % as much as 3 times a day by FR 5 %. The addition of CaCO3 treatment for all treatment generate a level of survival as much as 100 % (P>0.05). While growth rate of weights daily each treatment in a consecutive manner that is 11.34 %; 12.06 %; 11.51 %; 12.67 %; and 11.58 % (P>0.05). Absolute value of different length produce 2.84 cm; 4.63 cm; 3,23 cm; 3.79 cm; and 3.28 cm (P>0.05). During the research, the quality of the water is in the range that can be tolerated by the seed of catfish. The use of lime CaCO3 on salinity 4 g/L recommended as much as 250 mg/L CaCO3 with a turn of the water at regular intervals and feeding.