Either the manure was not composted enough, or you used way too much Osmocote, or all of the above.
Completely composted manure has no foul odor except for the smell of fresh soil/earth.
Completely composted manure does not look like manure, smell like manure or feel like manure.
It should look, feel and smell like rich potting soil.
Depending on the size pot you used, you can use the chart on the side of the Osmocote Container to use the correct amount.
In my half wine barrels, I use a half cup at the bottom and fill them up 3/4 with composted manure.
My water does get a little icky-green at first, but I leave it alone and everything stabilizes within a month.
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Look in the Terrestrial Gardening forum, I just posted a pic of a lotus I just potted.
Will take pix in a few days so you know what mine looks like when it gets green.
I leave well enough alone.
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