Well, the kind that I have says it has wintergreen oil to defuse the smell - I may try a little on my cyms outside, though - just in case they didn't quite get it right. My grandmother grew African Violets and always had a gallon of fish fertilizer around - I used to run out of the house, holding my nose when she used it!

Thanks for the feedback, everyone. Question, though - when you use it, do you skip the other kinds of fertilizers, or is it an adjunct to it?