This product can ship economy. We keep it in the refrigerator until you order, but it is shelf stable and does not need refrigerated, it's just preferred. NYOS® ARTEMIS is a liquid zoological plankton concentrate which contains Artemia salina High-quality raw materials Can be used directly No defrosting necessary Easy to use For fish and LPS corals Technical Details Content:250ml Species: Artemia salina (0.2-20mm) Usage: Can be fed directly ARTEMIS With NYOS® ARTEMIS you get a liquid zoological plankton concentrate which can be used directly. ARTEMIS contains high-quality Artemia salina(0,2-20mm). This provides ideal nutrition for numerous seawater fish and LPS corals. ARTEMIS strengthens seawater fish vitality and accelerates coral growth. High-quality raw materials Can be added directly to the tank, no defrosting necessary Easy to use Ideal for many ornamental seawater fish and LPS corals Garlic strengthens immune system of seawater fish Recommendations for use ARTEMIS can be fed directly, for example by means of a pipette or dosage cup.