Brightwell Aquatics Reef Blizzard-S Powdered Planktonic Food Blend for SPS & MPS Corals 50 Gram Pouch Powdered Planktonic Food Blend Size range of particles is suitable for small- and medium-polyp stony corals Simple to use Enables aquarists to custom-blend planktonic suspensions to suit the nutritional requirements of their reef system(s) Made in the USA of US-sourced, high-quality ingredients May be refrigerated for prolonged stability