Most bat guano is high in N anyhow you shake it.
If I were growing with it, I would mix it...1/4 cup powder per 1 gallon water. Shake it, pH adjust it, and water with it every 4 waterings during veg, and every other watering during flower.
Its quite natural so it will be difficult to over do it. I like tea method as it lays a fine silt on the soil surface that keeps it going with each water.
However, guano with no label, no instructions, no nothing prolly should be replaced with something you know about.
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