Dennerle Plant System Set is a fertilisation system complete set for professional fertilisation aof aquarium plants. The Dennerle fertilisation system encapsulates a wealth of experience gained in over 40 years of research into aquarium plants. The Set consists of:Dennerle Plant System E15, 20 tablettesDennerle Plant System E15 iron fertilizer supplies all aquarium plants with immediately effective bivalent nutrient iron to provide a fresh, lush green colouring. Deficiency symptoms such as yellow, glassy leaves are largely cured, and young leaves display a rich green colouring once again. Other vital nutrients such as potassium and manganese strengthen the plants and establish ideal conditions for powerful and lush growth. Dennerle E15 nutrient iron is protected from oxidation by highly effective shells (chelates) which maintain it in plant-available form over a prolonged period (depot effect).Dennerle Plant System V30, 100 ml:Dennerle Plant System V30 provides aquarium plants with all