I'm premixing my nutrients for the week and hand feeding my girls. Second day in my nutrients have brown specs in it... is this normal?

pics

I dont think brown specs are a problem per se.....but in hydro you want to keep nute solution as clean as you can using salts and avoiding all those additive that are used in soil grows or even coco.
Budswell if i remember correctly has molasses in it and the batguano to me seems just too raw for hydro...
Same as carboload (that btw i consider pretty much marketing hype...once you know molasses and potassium sulphate or magnesium sulphate).
Im just a beginner as far as hydro but im givin my cubes nothing else that a base formula (Megacrop A+B some Epsoms and enzymes ) and for the moment are raging healthy! I mix like you a 5gal bucket that last me more or less a week with no issues...
Good luck!