Crystal Red/Crystal Black Dwarf Shrimp COMBO Pack - 3 of Each! by Aquatic Arts Comes with 3 Crystal Red Shrimp and 3 Crystal Black Shrimp. Dwarf shrimp are very small and are not ideal for aquariums with medium to large-sized fish. Please research dwarf shrimp before purchasing to ensure compatibility with your tank's inhabitants. Fantastic coloration is sure to stand out in your aquariums, especially on green plants! Needs water with 7.2 ph or lower, and they do not do well in hard water. All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!