Short Communication: Water quality improvement of Nile tilapia and catfish polyculture in aquaponics system

Abstract

Abstract. Hasan Z, Dhahiyat Y, Andriani Y, Zidni I. 2016. Water quality improvement of Nile tilapia and catfish polyculture in aquaponics system. Nusantara . Research on the improvement of polyculture water quality in aquaponics system was conducted from July 2014 to August 2014. This study aims to improve the water quality in Nile tilapia and catfish polyculture by applying the aquaponics system. The results show that several water quality parameters increase, such as dissolved oxygen, ammonia, and nitrate. Meanwhile, Orthophosphate tends to be similar both in aquaponics system and control. The study is conducted experimentally by using completely randomized design. The cultured fish are catfish and Nile tilapia while the aquatic plants are water spinach and lettuce. At the end of the study the concentration of dissolved oxygen in the aquaponics system ranges from 5.3 to 7.6 mg/L, while in the media control ranges from 4.2 to 4.3 mg/L. Average concentrations of ammonia, nitrate and orthophosphate in the aquaponics system range from 0.003 to 0.25 mg/L, 10.0 to 50.7 mg/L and 3.0 mg/L-5.0 mg/L respectively. Meanwhile, in media control, concentration of those three parameters are 0.003 to 0.35 mg/L, 10.0 to 60.0 mg/L and 3.0 to 5.0 mg/L respectively. Based on this study, it is concluded that the polyculture water quality can be improved through the application of the aquaponics system.

The effectiveness of the use of filter on the number of Nitrosomonas sp. and water quality in aquaponics systems

“…82 of 2001 defines the safe concentration of phosphate in Class II and Class III water as 0.2 mg/L and 1 mg/L, respectively. This is in line with the results of research Hasan et al (2017) which states that the treatment with aquatic plants in aquaponic reduce the phosphate concentration, due to phosphate being used by the plant as a nutrient.…”

“…Andriani et al (2017) showed that the length of water-spinach reached 20-25 cm, while on lettuce the harvesting size was reached at the fourth week with average length 27.28 cm. The Chinese spinach weights increase in an aquaponic biofilter system is influenced by the degree of utilization of nutrient derived from the degradation of residual feed and fish metabolism waste product by nitrifying bacteria .…”

The effectiveness of filters on catfish Clarias gariepinus fry performance in the aquaponic system

“…Based on Ebeling et al (2006), good phosphate concentration in fish culture was 0.2-1 mg/L. Decreased phosphate concentration in the culture media in this study was thought due to water spinach absorption as a nutrient intake (Lestari et al, 2015;Hasan et al, 2017). A significant increase in phosphate concentration occurred in the third observation, which may occur due to related to decreased phosphate absorption by matured plants that were ready to be harvested (Wasonowati et al, 2013).…”

Produktivitas Budidaya Ikan dalam Berbagai Konstruksi Sistem Akuaponik (Review)

“…Konsep dasar pembuatan akuaponik adalah adanya hubungan saling menguntungkan antara tanaman dan ikan dimana tanaman mendapatkan nutrisi untuk pertumbuhannya dari feses ikan yang larut dalam air, sedangkan akar tanaman berguna sebagai filter biologis sehingga menghailkan kuallitas air yang baik bagi kelangsungan hidup ikan (Hasan et al, 2017). Desain sistem akuaponik dapat dibuat sesuai dengan kondisi lahan, jenis ikan dan tanaman yang dipelihara (Somerville et al, 2014).…”