In may last couple of posts on manure tea and compost tea I explained why there is little or no reason to brew the tea. I am sure that I have not convinced all of you since the web is full of stories promoting manure tea as a good thing for your plants. If you want to brew some tea it probably will not harm you or your plants, but it could; see the bottom section of Compost Tea.
If you must brew some tea, please do it intelligently. Don’t use commercial products!