Dennerle Plant System S7 is a special concentrate that provides fish and plants with all those important vitamins, trace elements and other vital substances that need to be topped up frequently. In nature, vitamins, plant enzymes and other active organic substances are produced constantly, with the help of natural sunlight. These vital substances improve the health of fish and enhance their splendid colourings, while at the same time promoting the growth of aquarium plants. An aquarium has no natural sources of vitamins. Any vitamins that are present remain stable for only a short time, or are used up very quickly. This makes it all the more important to supplement these vital substances on a regular basis.Effect on fish:Dennerle Plant System S7 incorportaes protective colloids to strengthen the mucuos membrane - a fishs most important barrier to protect from pathogens. Dexpanthenol promotes the regeneration of minor injuries. A special immune stimulator strengthens the fishs defences.