have you taken a candida test - the saliva one - to verify that you actually have virulent candida? Anal itch can be due to humidity and diet changes throwing off the skin's balance, it doesn't have to mean systemic candidiasis. Even an abrasive TP can cause it, or synthetic clothes that don't breathe well. Applying a poultice (cloth soaked) of apple cider vinegar or witch hazel would help in that case.
Colosan is a nice addition to balancing bowel flora, if you add it to a complete colon cleansing regimen. It won't be enough on its own.
Yep, you can add Miracle to your colema solution. Still add salt, tho, to soften the water more.