Live Brachionus roundiformis provide an excellent food source for coral and fish fry. These rotifers are zooplanktons that have been fed with an enriched microalgae. Given their size (90-150µm), B. roundiformis have been successfully used in larval culture of newly hatched fresh water and marine fish. They have also been used to feed a variety of corals and other invertebrates. SPS coral, crinoids and clams have benefited greatly from the addition of enriched rotifers to a dosing/feeding routine.
Rotifers can remain dormant for up to 3 weeks in the refrigerator with access to air. Be sure to store with the cap open. They are kept at a specific gravity of 1.018 and can be strained through a coffee filter to use for (feed) Freshwater larvae/fry. 200-250 rotifers per mL. More concentrated live rotifer bottles are available.