Karis Quanlong Hang on Filter - Compact and artistic design - High quality and reliability - Mechanical and biological filtration system - The pump adapts to both fresh and saltwater - The pump adapts to water temperatures from 0°C to 35°C - The pump should not operate outside of water Model: QL-629 Power: 3.5 watts F.Max: 200 liters/hour Filter: 2 pieces With foam remover device ----- Model: QL-639 Power: 4.2 watts F.Max: 260 liters/hour Filter: 3 pieces With foam remover device ----- Model: QL-659 Power: 4.8 watts F.Max: 290 liters/hour Filter: 4 pieces With foam remover device