yea ^ hes pretty much right. i try to dilute a lil extra when adding anything darker then my own poop, or thicker then my urine.
seriously tho, id get the amount your adding in, mix it with water in a cup, stir til its fully disolved/mixed then add it in. ive had great results with stuff i couldn't identify the origin/composition of before.
EDIT: that shit looks pretty damn foul tho. it must be good