Spirulina Capsule thrives at a pH around 8.5 +, which will get more alkaline, and a temperature around 30 °C (86 °F). They are able to make their own food, and do not need a living energy or organic carbon source. In addition, spirulina have to have an ensemble of nutrients to thrive in a home aquarium or pond.
A simple nutrient feed for growing Spirulina is:
- Baking soda- 16 g/L = 60.56 g/gal
- Potassium nitrate- 2 g/L = 7.57 g/gal
- Sea salt- 1 g/L = 3.78 g/gal
- Potassium phosphate- 0.1 g/L = .378 g/gal
- Iron sulphate- 0.01 g/L = .0378 g/gal
- Which can all be found in aquarium or else in the agricultural division, all commonly occurring compounds except for the iron sulphate. The algae has actually been tested and successfully grown in human urine at 1:180 parts. After 7days, 97% of NH4+-N, 96.5% of total phosphorus (TP) and 85–98% of urea in the urine (ca. 120-diluted) were removed by the microalgae under autotrophic culture (30 °C).
- Spirulina was a food source for the Aztecs and other Mesoamericans until the 16th century; the harvest from Lake Texcoco and subsequent sale as cakes were described by one of Cortés' soldiers. The Aztecs called it "tecuitlatl". Spirulina was found in abundance at Lake Texcoco by French researchers in the 1960s, but there is no reference to its use by the Aztecs as a daily food source after the 16th century, probably due to the draining of the surrounding lakes for agricultural and urban development. The first large-scale spirulina production plant, run by Sosa Texcoco, was established there in the early 1970s. Spirulina has also been traditionally harvested in Chad. It is dried into cakes called dihé, which are used to make broths for meals, and also sold in markets. The spirulina is harvested from small lakes and ponds around Lake Chad.