BTW, ITS NOT THE PROTEIN % CONTENT that you have to worry about. ITS THE KIND OF PROTEINS THE FOOD IS MADE FROM.
Spirulina is a HIGH PROTEIN FOOD
Simply because a food has a low protein count doesnt make it a "perfect" food for mbunas. Mbunas need protein as any other fish does. It's their ability to process certain proteins that makes it less desirable to feed them a meaty diet.