his research is to study the effectiveness of a simple sand filter system. Tank filter the tank filter and slow speed for water treatment from aquaculture. A study using the drainage from the hatchery rearing Tilapia in reaction tank design, with 15.24 centimetres in width, height 150 cm and length 30 cm overflow from the study found that sand filter size 2 mm, height 80 cm. suitable for the design of the filter tank, this time trial speed.By effective in the removal of turbidity Solid particles suspended value b o good nitrate nitrite and ammonia 59.98 96.95 percent 2.23 and 0.51, respectively, 15.62 48.15. There are periods in the system is equal to the volume of water filtered 56 minutes 252 litres and the filtration rate equal to 14.87 cubic meters per hectare-hour filter tank slowly in time trials, is the size of the filter sand 1 mm, height 120 cm, by effective in removal of turbidity. Solid particles suspended value b o good nitrate nitrite and ammonia 84.24 97.91 percent 6.14 and 0.74, respectively, 61.82 22.63. There are periods in the system is equal to 42 minutes, volume 72 litres of filtered water and the filtration rate equal to 5.57 cubic metres per square meter-hour sand filter system tank filter the tank filter and slow speed that was designed in this can treat turbidity. B temperature o DPH and suspended solid particles, is to defy the standard drainage effluents from freshwater rearing hatchery. The Ministry of natural resources and the environment, but not to the standard criteria in accordance with ammonia. For nitrate and nitrite, water quality before trials are of value not exceeding the standard value defined.