Langbeinite

I've been researching teas and different meals and guanos and I think this would be a great late flower addition to teas as it gives Potassium, Magnesium, and Sulfur. Also read somewhere that it could contain chlorine that will kill microbes.

The ingredients I plan on using in the bloom tea are:

Earthworm Castings
Jamaican bat guano
Fish Bone Meal
Alfalfa Meal
Kelp Meal
Unsulphured Black Strap Molasses

The Kelp and molasses are supposed to be good sources of potassium, but they average at around 2%. Would adding the Langbeinite with these ingredients cause the plants to have a potassium excess?

All the ingredients you mentioned can be cool, and they have their uses.

But amounts matter. You don't want to be getting crazy with intense P and K sources. How much of that stuff are you gonna put in there? How are you going to prepare it?

How much EWC and compost do you have? Could you mix your dry ingredients into the EWC/compost, give it some time to break down, then top dress with that?