O2 Grow Dissolved Oxygen Emitter 2020 - 20 Gallons O2 Grows patented technology elevates the dissolved oxygen levels 50% more than bubblers through electrolysis without increasing the temperature of your water. Bubblers and venturis simply "blow" air through the water The O2 Grow technology actually "manufactures" 100% pure oxygen Increases speed of plant growth, size of root ball, number and size of flowers and nutrient uptake. O2 Grow uses no moving parts or motors that wear out Saturates up to 20 gallons with pure oxygen for the hobbyist or professional looking to increase plant health and yield