ISN Fulvic Max ISN Fulvic Max helps maximise nutrient intake. ISN Fulvic Max is a true NASAA organically certified product which ensures an efficient nutrient intake creating long chain compounds within the plant. ISN Seaweed and ISN Microbes are the ideal companions to use with ISN Fulvic Max. All of these products are organic and when used together they work to stimulate rapid root growth, alleviate stress factors and boost the plants immune system. By increasing the use of natural organics, you reduce the build-up of inorganic salts in the plant; which will naturally result in a higher quality outcome.