Continuum Aquatics Flora Viv K Concentrated potassim supplement for freshwater planted aquaria FloraViv K is a high quality, concentrated, bio-available, potassium supplement for freshwater planted aquariums. It is designed to provide critical supplemental potassium for biological processes in all plants, such as photosynthesis, nutrient uptake, and strong root growth. Potassium deficiency in plants often causes chlorosis, and is seen as pale leaves even tissue decay. Other deficiencies can cause similar symptoms, such as deficiencies in nitrogen, iron and magnesium. It is therefore recommended that the hobbyist use FloraViv first, to provide a wide range of plant nutrients, and then use then use FloraViv K, this product, to supplement potassium, if necessary. FloraViv products contain no toxic polycycloglutaracetal or glutaraldehyde.