I also wonder if any tariffs on potential significant future...

I also wonder if any tariffs on potential significant future sales to the USA will even affect sales to the USA? If there is no other product that will do the job effectively on a large scale and funds have been committed to do the job then will an extra "Trump induced" cost on top of the normal price reduce the amount of Phoslock that will be purchased or do they still apply the amount required to do the job despite the tariff? This is government money after all so how much of a concern will it be to decision makers to pay the extra that was their own governments doing?