Diagram of a static mysid culture system. The two top tanks (culture trays) were used for holding broodstock, the two middle tanks (hatchling trays) were used for the hatchlings, and the bottom tank was the biological filter tank, containing a particle filter, activated carbon filter and a submerged, oyster shell biological filter. Water drained through the screened cores in the culture and hatchling trays into the biological filter tank. It was then drawn from below the crushed oyster shell media, and pumped back into the culture and hatchling trays through the supply lines.