UTEX sells Spirulina Medium at 1X concentration only. Stock solutions and individual components for this specific medium are currently not available for purchase.

Spirulina Medium

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Deadline to place an order for Spirulina Medium with a 2022 shipment date:
Dec 14, 2022 at 5:00 PM CST

Spirulina Medium

Modification of the SAG medium. Alkaline media suitable for LB 2340 Spirulina platensis and LB 2342 Spirulina maxima.


In order to prevent the formation of precipitates during autoclaving, two solutions are prepared as follows:

For 1 L Total
  1. After both solutions 1 and 2 are sterilized, transfer the contents of Solution 2 into the flask containing solution 1, and swirl to mix thoroughly.
  2. Store at refrigerator temperature.
# Component Amount Stock Solution Concentration Final Concentration
1 Spir solution 1 500 mL/L
2 Spir solution 2 500 mL/L

Important Notes To Consider:

  • The quality of water, including natural seawater, is important. The term 'dH2O' generally refers to distilled, deionized, distilled/deionized water, Milli-Q water (Millipore Corp.), etc. Natural seawater and natural freshwater should be obtained from a non-polluted source.
  • When dissolving chemicals, wait for the first component to dissolve before adding the second. Stirring, and sometimes the addition of heat, is often required to dissolve the chemicals efficiently. Preparation of stock solutions for frequently made algal culture media make preparing media convenient but also necessary to avoid errors from weighing very tiny amounts.
  • Attention should be given to the pH of the final medium. In most cases, if pH adjustment is required, this occurs before sterilization. Please note that autoclaving removes carbon dioxide from media lacking carbonate stabilizing buffers. This would make the medium very alkaline soon after removal from the autoclave. In these cases, you should wait approximately 24 hours for gaseous equilibrium before inoculating the medium.