The research aimed to compare different diet formulas on growth, carapace width, carapace length, cost, nutritional value, pigment, heavy metal and water quality were studied. The Ricefield crab (Sayamia bangkokensis) culture were conducted in the cement pond (100 L.), 12 ponds. Four treatments with three replications each CRD were applied including T1 pellet catfish feed, T2 pellet catfish feed+raw Arthrospira 30%, T3 pellet catfish feed+Water meal 30%, T4 pellet catfish feed +powder Arthrospira 3%. Ricefield crab initially stocked were 11.80?0.51 gm/crab, in weight at a density of 20 fish/m2 and feed 5%/crab weight/day. Data was collected every 30 days for a 150-day period
It was found that crab cultured with pellet catfish feed+ powder Arthrospira 3% had average weight (36.85?0.85 g/crab), average daily growth (0.167 g/crab/day), weight gain (210.67 %/crab), specific growth rate (0.77 %/day), survival rate (91.67 %), feed conversion ratio (0.42) and protein efficiency ratio (0.62) and significantly (p < 0.05) bester than the other experiments. The carapace width and carapace length, it was found that the crabs were fed with 3% Arthospira powder and 30% of the raw Arthospira pellet and significantly (p < 0.05) bester than the other experiments. The pellet catfish feed+ powder Arthrospira 3% cultured of ricefield crab, cost of 4.03 baht/body, 23.59% protein, 0.31% fat and carotene 0.06 mg / g and significantly (p < 0.05) bester than the other experiments. The heavy metal in all four treatments of experiments did not find the heavy metal content. The water quality of crab cultured in all experiments were not significant difference and were in the aquaculture standard.