6C Alumina is still better than the best Mag Malate (1:5). 30C is about the same pellet to capsule as one AOR Mag Malate which is equal to 5 other Mag Malate.
One Tri-boron is equal to 10 pellets of 30C. The reason for the "Tri" is to have it bound to different amino acids including asparatate as to get it everywhere ASAP.