Figure Eight Puffer Alternative Name(s): Scientific Name(s): Tetraodon biocellatus Category: Tropical Difficulty: Maximum Size: 8cms Minimum Tank Volume: 70 litres Minimum Tank Size: 30" x 12" x 12" Water Temperature Range: 22-26°C Water pH Range: 6.5-7.5 Water Hardness Range: 5-12 dGH