UJI EFEKTIVITAS SISTEM DAN TEKNOLOGI AKUAKULTUR BERBASIS  ASIMILASI LIMBAH AMONIA: GREEN WATER SISTEM, BIOFLOC, DAN  AQUAPONIC SEBAGAI SOLUSI UNTUK BUDIDAYA IKAN GABUS  (Channa striata)

Authors

Snakehead fish cultivation in South Sumatra were still relatively small, but the market

demand for snakehead fish were quite a lot to be used as a processed material or for

treatment. Cultivating snakehead fish, the obstacles faced are ammonia waste (from

leftover feed and feces) causing death in cultivated fish. Application of aquaculture

technology systems that can minimize ammonia waste, namely the Green Water System,

Biofloc, and Aquaponic. These three systems have the ability to absorb ammonia

bicarbonate contained in snakehead fish farming waste. The purpose of this research is to

find the best aquaculture system in reducing nitrogen waste and producing the highest

snakehead fish productivity. This research used a completely randomized design (CRD)

with 3 treatments and 3 replications, namely green water system (GWS), biofloc

technology (BFT), and aquaponics (AP). The fish used were snakehead fish (Channa

striata) measuring 7±05 cm, which was reared for 60 days, the test plant used in

aquaponics was pakcoy, while the green water system used spirulina. Water quality data

were analyzed descriptively using tables and pictures. Production performance data were

analyzed for variance (ANOVA) with a 95% confidence interval. If the results are

significantly different, then a further test is carried out using the Tukey test. The results

obtained in this study included all treatments capable of creating optimal water quality in

the form of ammonia, nitrite and nitrate for snakehead fish, and the GWS treatment

produced the lowest ammonia, nitrite and nitrate values. The survival resulted in all

treatments above 80%, with the best growth in weight and length obtained in the BFT

treatment. The best feed conversion ratio was also produced by the BFT treatment by

suppressing the lowest RKP value