Jupiter Compatible Replacement Biostone Ionizer Filter for Delphi Athena Melody Venus Orion Aquarius Neptune Mavello 1ea Compatible Replacement Filter for Jupiter Ionizers Made in Korea Biostone 0.1 M/Filtration capacity: 3,000l *This filter is a compatible replacement made by Korean OEM manufacturer. Compatible Models: Delphi, Athena (2nd), Isis, Melody, Venus, Orion, Aquarius, Neptune, Mavello, MicroLite, Miracle, Miracle Fountain, Regency X, Regency Elite, Alkal-Life 3000SL, AMWater Actify AK-8000, AMWS903 (NOT Athena H2 and Melody II)