We sell 3 types of chlorella. All come in powder or tablet form (dependent on availability). Here is some information about each one.
Organic Clean Chlorella: https://www.healthrangerstore.com/collections/chlorella/products/organic-clean-chlorella-powder-10-oz-283g (Product of Korea) -Chlorella vulgaris strain that is grown indoors under tightly controlled conditions and in a farm that is certified organic.
Organic Clean Chlorella SL: https://www.healthrangerstore.com/collections/chlorella/products/organic-clean-chlorella-sl-powder-10oz-283g (Product of Taiwan) - Chlorella pyrenoidosa, grown in sunlight and hydrated with fresh mountain spring water.
Clean Chlorella: https://www.healthrangerstore.com/collections/chlorella/products/clean-chlorella-powder-10oz-283g (Product of S. Korea) - Chlorella vulgaris grown indoors but is not "certified" organic however, we do test it as well to make sure it meets our high standards.
The major differences between these are the country of origin, process of growing and organic certification. All 3 are fantastic options for optimal health, so it really depends on personal preference.