Carbon deficiency is one of the leading causes of poor plant growth in aquariums. API? CO2 BOOSTER product adds essential liquid carbon for planted aquariums to fuel the photosynthetic process and turn light energy into new plant growth. API CO2 BOOSTER product supplies simple carbon compounds, and slowly releases CO2 to aquarium plants. Product may be used alone, or in conjunction with CO2 systems. Safe for use with freshwater fish, and will not alter pH.