I have recently begun looking at algae as a dietary supplement and I would like to grow it on my own. I am aware that spirulina doesn't require cell cracking; however I already have a high protein diet and I prefer chlorella. Chlorella's cell wall is indigestable and this prevents our bodies from getting any more than 40% of the nutrients. I would like to know if that figure sounds right. The biggest problem I see with growing my own Chlorella is cracking it. I wondered about pulverizing it in a blender or using the hot to cold method, but it seems all methods other than ultrasonic waves will destroy most of the nutrients. Is it still better to use one of these methods to get the nutrients out, or would it be best to go uncracked. Or is there a practical way to use the sound to do it.