for aquariums up to 375 liter - max. 750 l/h Air - 3.500 l/h Water = 1 Pump RD X 3000 DC 12V

for aquariums up to 500 liter

hard facts Bubble King^®Double Cone 180 RDX:
max. 1.500 l/h air-intake // max. 4.000 l/h water-intake
with Red Dragon^® X pump 50 Watt / 1.500 l/h air intake
Base plate: 22 cm x 28 cm / height ~ 53 cm

for aquariums up to 1.000 liter

hard facts Bubble King^®Double Cone 200 RDX:
max. 1.500 l/h air-intake // max. 4.000 l/h water-intake

for aquariums up to 1.500 liter

hard facts Bubble King^® Double Cone 250 RDX:
2.500 l/h Air - 6.500 l/h Water = 1 Pump RD X 6500 DC 24V

for aquariums from 150 up to 300 liter - 750 l/h Air - 3.500 l/h Water = 1 Pump RD X 3000 DC 12V

for aquariums from 1.000 up to 2.000 liter - 2.500 l/h Air - 6.500 l/h Water = 1 Pump RD X 6500 DC 24V

Bubble King® Double Cone 200 + BK DC 24V for aquariums up to 1.000 liter

max. 2.500 l/h Air - 7.500 l/h Water

Red Dragon® Bubble King® skimmer pump DC 67 Watt / 2.500 l/h  with 24V Technology for Bubble King® Double Cone 180 - 200 - 250 - 300

Red Dragon® X skimmer pump 30 Watt / 750 l/h 
with 12V Technology
ONLY for Bubble King® Double Cone 130 + 150