SYMBYS PRIMO MARINOS Boost Micronized Nitrogen Fertilizer (8-5-1) - 5 LBThe PRIMO MARINOS you know and love, but with more phosphorous. PRIMO MARINOS is a water soluble fish Food grade micronized nitrogen fertilizer and uses sustainable harvested whole sardines. This means the proteins from the fish flesh are available as the best cost effective, highest grade, fast acting L Amino acids. INCREASE PLANT VIGOR The PRIMO MARINOS Micronized Nitrogen Fertilizer you know and love, but with more phosphorous. Most fish