Fish Hydrolysate vs emulsion

​Question:  Someone on a Facebook group recently suggested that I use a fish hydrolysate for my potted plants. I have fish emulsion, is that okay to use?

NICK: Great attempt at trying to pronounce that word. I’d pronounce it hydrolysate. A fish hydrolysate and a fish emulsion are two different things, yet they are both used for fertilizing plants. One is better than the other. Fish emulsion after they process part of it for food, they'll make oils out of it and make up and other non-essential things, and they really cook all the nutrients out of it. Whereas a fish hydrolysate, after they use it for edible purposes, is a cold process, which retains more nutrients. My vote is for the hydrolysate.