Foodie Puppies Phyto CARB is a source of bio available organic carbon. All plants require a source of carbon. This is typically obtained from CO2, but, may also be derived from simple organic compounds. One can derive a substantial benefit with the use of Phyto CARB either alone or in conjunction with CO2. The combination is particularly ideal for situations when continuing to add CO2 could result in dangerously low pH levels. It increases the efficiency of iron assimilation by plants & can also be used for algae problems also.Use in with combination with Plant Food + Plant Health Formula and K++ for best result and optimum plant growth.Instructions:-3ml per 100 litre daily or every alternate day.Ingredients:-Organic Carbon Compounds.Free:- Foodie Pupppies Key Ring.