Spectrum Reef Cell Small Microcap Powder (10-80 Microns) 15g
Reef/Cell is designed for SPS stony corals and filter feeding invertebrates, with food particle sizes from ten to 80 microns, with 80% of particles 50 microns or less.
This is equivalent to the size of most phytoplankton and zooplankton.
The micro-encapsulation process creates a non-polluting, water-stable particle that tends to be neutrally-buoyant in salt water and stays in an aquarium water-column for an extended time.
Micro-encapsulation is a process developed in the pharmaceutical industry in which micro-particles of nutrient are embedded in a matrix of water-stable binder such as alginate.
In the nature, live corals are surrounded by masses of plankton, where the lower nutrient density isn 't a problem.
At home when you are feeding just twice a day, nutrient density suddenly becomes very critical which is why Reef Cell has been devoloped the way it has.
Reef-Cell has at least ten-times the nutrient density per particle of plankton.