red sea foundation b

Im currently dosing 1ml of All For Reef daily and testing seem high on cal (~450-500) and mag (~ 1500). alk is ~8.5-9dkh. AFR direction said lower AFR and dose balling part B if high on Ca and low or same on alk. so I will cut to 0.5ml daily But can I dose red sea foundation B (alk) instead of...