The The Effect of Waste Water Catfish Pond on Spirulina sp. Cultivation
he Effect of Waste Water Catfish Pond on Spirulina sp. Cultivation
The use of high stocking densities encourages farmers to use protein-made feed to meet feed requirements. As a result, there is a decrease in water quality of cultivation which is triggered by the high remaining food and the rest of the metabolism of fish. Iswandi (2016) explained that the inedible feces and feed produced by products in the form of phosphate (PO4), ammonia (NH3), nitrite (NO2), and nitrate (NO3). An effort that can be done to reduce the content of ammonia is to convert these materials by photoautrophic through algae or plants. One of the algae that is able to utilize these ingredients is Spirulina sp. Therefore, this study aims to determine the effect of the use of waste water in catfish farming as a growth medium for Spirulina sp. This research began on the 1st to 12th of September 2018 at the Batu Kumbung Aquaculture Center, Lingsar District, West Lombok. The treatments used were P1 (fresh water + Spirulina sp. + Fertilizer), P2 (Waste water from catfish pond + Spirulina sp.) And P3 (Waste water from catfish pond + Spirulina sp. + Fertilizer. The results obtained, the treatment of P3 with a combination of fertilizers with wastewater catfish pond is the best treatment by producing a density of 25,400 synosoid / ml, Biomass of 0,174 grams / ml, and Specific Growth Rate of 0.19 sinosoid / ml / day and has the fastest doubling time 3,554 days between treatments P1 and P2.