Hey Sam-
Horse manure is high in nitrogen, great from May until now (last week of August) when you want lots of growth and lots of leaf production on our plants.
I'd remove the horse manure during flowering. The first few weeks is okay, but from here on out I'd cut the horse manure out. I like the Sweet feed though (molasses drenched corn correct?) but not to much molasses in your teas. Plants have a hard time breaking down complex sugars, the molasses is mostly there to feed your micro-beastie herd. It has other benefits too, just be careful on to much molasses. Most growers add 1 tablespoon of molasses to a gallon of water, I only add 1 teaspoon per gallon.
Tea's are a whole new avenue in the growing world, done right it can be very rewarding.
Good Luck,
TMB-