It's a 2-3-1 formula, so very weak. You'd have to use 5 teaspoons per gallon to equal the concentration of nutrients you get from 1/2 tsp of the MSU WW or 3/4 tsp of the RO formula - and it's doubtful that it has the complete array of nutrient minerals.
It is certainly not an additive, and I can see no good reason to substitute it or alternate fertilizers at all.
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One should not go about thinking that any fertilizer is any more beneficial than another - and they're certainly not "magical". If the formula is balanced & complete, and you use it properly, your plants are getting the most they can, nutritionally.
If your plants are still not up-to-par with what you think they should be, look at the other aspects of your culture in relation to thier individual needs.
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