AS and K2SO4? Two things I seldom see in a fertilizer blended for Hawaii. Even though those two sources would be totally correct. Most landscape plants and turfgrass species are not halophytes. If someone applied that AS and K2SO4 blend evenly at no more than 2 lb per 1000 sq ft every 4 weeks, that is a good program. Much better than KCl and your coated urea du jour. I have to think about Cl. Clay holds on to Cl and there is significant salt in irrigation water.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738