hi there ..
a big problem to start growing spirulina at home is to obtain starting live spirulina . I have heard it is possible to have a glass of pure water and some nutrition in it, then after some weeks you will have some spirulina growing in this glass ! It is said by natural articles in the air some cells of spirulina will come into the glass and start to grow ..
question is : is the suggestion above true to obtain some spirulina to start grow your system ? and weather is it safe ? i mean what if some sort of dangerous spirunila will come through the air to the glass and form a non wanted sort of spirulina ?
or maybe all sort of spirulian coming by air to a glass of water are welcomed and healthy ?