They're both almost the same thing in that they're both beneficial bacteria. I don't see why you couldn't mix em. The thing you don't want to do is mix hydrogen peroxide and beneficial bacteria cuz the hydrogen peroxide will just kill the beneficial.
thanks man! I was freaking out because I saw a brown looking fluid all over my root,s turns out it was from the liquid karma I used. bahahah Thought I had made some toxic concoction