Each treatment was repeated three times, so there are 9 units of the experiment. Tacks substrate type eggs are used as treatment, water hyacinth (Eicchornia crassipies), rafia rope and sugar falm fiber. This research used experimental and observational methods, research design used was a completely randomized design (CRD). This study aims to determine the type of engaging subsrat eggs that give the best effect on the success of spawning goldfish (Carassius auratus). How that can be done to stimulate the provision of parent fish are egg laying substrate. The success of spawning is influenced by several factors, including the handling of aircraft, particularly in stimulating technological parent spawning, egg incubation and larval treatment. Goldfish spawning is done naturally, so the success of the nurseries are still low.
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