I have never measured it in ounces - I usually put 3 or 4 hand fulls of cut comfrey leaf or root, or BF&C into a cloth - then I pull the sides of the cloth up and rubberband the top together. If you are using a regular bathtub - then I would hold the bag of herbs under the running water as the tub fills up, so the water is running through the herb. When the tub is full, I put the ball of herbs in the tub to float and continue to steep into the water. If you are using a jetted tub, then I would put the ball of herbs into the water and turn the jets on which will steep the tea out into the water.

I'm not sure how old of a boy you are talking about, but if he is old enough to take capsules (8 - 12?), I would be doing more than 6/day - probably 4 or 5 every hour or two while awake. Also check the ingredients in your capsules - if there is no comfrey in it, I would add some comfrey tea to the regime. Also, I would not immobolize the knee - you are dealing with a joint, so if you immobolize it completely, you will cause it to become stiff and hard for him to move, which means when you are finished - you will have to do alot of physical therapy to break up the adhesions and get it moving again. It is OK to wrap it when you have a fomentation on it or when it is packed with ointment, but don't worry about letting him move it in the tub or when you unwrap it.

It sounds like you are doing a wonderful job and I would expect a full recovery - keep me posted.