HealthAlgae

How to grow Spirulina?

You can grow Spirulina in many ways. Simply put, you need a container (best is transparent HDPE/PE, PET plastic or glass and often referred to and called photobioreactor), tap water (without chlorine), a nutrient medium and a Spirulina starter culture.

How to make a Spirulina nutrient grow medium?

To make a easy Spirulina grow nutrient medium, you need to fill five criteria: 1.) You need clean tap water (without chlorine – chlorine can be boiled away)2.) Nutrients (nitrogen, phosphate, potassium, sulfur, iron, calcium etc.). Most of the lesser ones can be found in the tap water and in NaCl. This, except from the CO2 is what the Spirulina will “eat”.3.) NaCl in the form of table salt or sea salt.

Best pH to grow Spirulina in?

For Spirulina to grow it need to be in a medium above pH 8.0. Best is not to go beneath a pH of 8.5 and the target range to be in is between pH 9 and 10. As Spirulina grows it will naturally increase the pH. The pH can naturally reach as high as 12. But at a pH of 12 Spirulina stops to grow. The good thing with a high pH is that other algae and bacteria can’t grow in it or even die.