“…Decreased bioavailability of minerals such as zinc due to dietary phytates as anti-nutritional factors (ANF) should also be taken into consideration (McClain et al, 1988). Sodium and potassium are found in Kasper et al (2000), Shiau and Lo (2000), Lim et al (1993Lim et al ( , 2011b, Soliman and Wilson (1992a, b), Shiau and Suen (1992), Ayyat et al (2011), Shiau andHsieh (1997), Shiau and Chin (1999), Shiau and Huang (2001), Barros et al (2009), Shiau andLung (1993), Soliman et al (1994), Hsu (1995, 1999), Peres et al (2004), Shiau and Su (2005), Saleh et al (1995), Hu et al (2006), Guo et al (2010), Shiau and Hwang (1993), Eleraky et al (1995), Huang et al (2003) 2007), Shiau and Sh, (1998), Pan et al (2003), Shiau and Hsieh (2001), Dabrowska et al (1989), Reigh et al (1991), Shiau andSu (2003), Robinson et al (1987), Shiau and Lu (2004), Cnaani et al (2010), Eid andGhonim (1994), do Carmo e Sa´ et al (2004) abundance in water needing no supplementation whereas the supplementation of other minerals like selenium and iodine are required ( Van der Velden et al, 1991a, b;Davis et al, 1996). For Nile tilapia the requirements for minerals has been listed in Table 3.…”