Likewise,
I remember that being used in my household from when I was a kid.
Sure it smells the the "Fish Monger's" dumpster, but it works great and doesn't burn. Make sure you shake the bottle before using. I don't use it in a spray bottle indoors for the fact it smells. The cats run the other way.I add to the watering can indoors , but have foliar fed outdoors. Just don't spray the plants in the bright sun or on a windy day..........for your sake. I also wouldn't keep it around more than one season. What's left I use up outdoors before the end of the season on flowers and so forth. I buy a new bottle each season.
Greg