Then I guess m full of shit. There are tried and proven recipes of NPP that I posted and have made myself.
There is a thread in this forum if you scroll or do a search you can find the recipe, that uses less than 2% BA and 20% bb..those are high and BA is a preservative and any more than 1.9% or 1.9mls is more than enough and the BB is a thinner, not a preservative.
Please do a search first and if your asking it most likely someone else has too..just ask the Vets here we have seen it over and over.
As for your NPP 1.9mls BA and 12Mls BB in a GSO/CTNSEED or EO/GUOC mix will work fine. This is at 100mg/ml anything higher will be supersaturated and it will settle out of solution.