By controlling the main water quality indexes (Temp, pH, ORP, Salinity, DO, MLSS, NH₃, NO₃-, NO₂-), Recirculating Aquaculture System can create an ideal growing condition for aquatic animals, thus the indoor RAS fish farm can realize a sustainable aquaculture irrespective of the influence of regions and seasons. Considering different aquatic species have their own favorite environment, each RAS should specially plan. The suitable aquatic species for RAS industrial production includes tilapia, cat fish, sun fish, perch, carp, loach, sturgeon, white fish, crayfish, turbot, grouper, sea bream, jelly fish, tiger prawn, white shrimp, etc. The main RAS restraint is the operation cost.

The RAS consists of:
Temperature control: heat pump, water heater;
Filtration equipment: drum filter, bio filter, sand filter;
Aeration equipment: air blower, oxygen generator;
Sterilizing equipment: ozone generator, UV sterilizer;
Bio filtration: bio filter, bio tank, bio media;
Circulating power: water pump, fish tank;
Master control: auto control system.

Model	Water Body	Stocking Density	Power Cost	Floor Area	Crop
RAS030H	30m3	80kg/m3	<3.1kW/h	<60m2	2400kg/cyc
RAS050H	50m3	80kg/m3	<3.4kW/h	<100m2	4000kg/cyc
RAS100H	100m3	80kg/m3	<7kW/h	<200m2	8000kg/cyc
RAS250H	250m3	80kg/m3	<22kW/h	<500m2	20000kg/cyc
RAS360H	360m3	80kg/m3	<31kW/h	<720m2	30000kg/cyc
RAS500H	500m, 3	80kg/m3	<44kW/h	<1000m2	40000kg/cyc