The other part of the hydroponic system is the lower bed – the reservoir with the mix of water and nutrients dissolved in it.  Aquarium pump, regularly triggered by a timer, sends water solution up into the tray with plants.

The most important thing is to keep the correct composition of water solution in the reservoir – this is the key factor of the hydroponic garden flourishing. Many beginners find it difficult to maintain the right pH level of the water, necessary amount of nutrients, and their correct ratio. 

Standard organic plant nutrients are available to fertilize plants; however, many people are reluctant to do that, as they think such fertilizers will quickly make the water reservoir dirty. Indeed, organic nutrients interact with the organisms in water, which leads to their decomposition. Specialized concentrated nutrients, on the other hand, keep the reservoir relatively clean, since they are synthetically made and thus they cannot interact with the organisms in water. Nonetheless, such “clean” fertilizers will severely burn the plants roots if used in access.

Being pumped into the grow bed, water with a fertilizer saturates the plants and returns to the reservoir lacking the previous amount of nutrients and ppm (parts per million). Thus, its composition is always different and changeable. That is why a gardener should always monitor water solution, controlling its pH level and plant nutrients amount.

The lower bed is necessary to keep the water with the dissolved nutrients in it. The water is pumped with the help of an aquarium pump to the upper bed in order to water the plants. This procedure is repeated several times a day at equal intervals, being controlled with a timer.

Gardeners sometimes find it difficult to maintain the pH level of the water, its nutrition rate, and the ration of nutrients at the right level. These are, actually, the key factors, due to which a hydroponic garden or an organic hydroponics prospers. If these three crucial things in gardening are kept in balance with the help of Organic fertilizers, such technique of plants growing is called an Organic Hydroponic Garden.

Organic fertilizers are better for the plants than the chemical ones, as the latter are capable of burning the roots if used in higher concentrations.

When water solution is pumped to the trail with plants, it is partly absorbed by the medium and by the plants roots till saturation point. Consequently, the pumped water, returning back to the reservoir, contains lesser amount of parts per million (ppm) than before. 

Organic nutrients make hydroponic gardening easier, as they do not contain any chemicals, which can change the pH level or ppm of the solution. As a result, many problems, listed among the most common ones of organic hydroponic gardening, get solved on their own.    

It is a common knowledge that the upper part of a plant’s root uptakes nutrients, while the lower one absorbs water. To increase plant’s saturation with nutrients, it is possible to directly add them to the upper part of the roots, which, in the long run, will result in the more efficient organic hydroponics. To introduce such technique into your organic hydroponic garden, you should develop an organic hydroponics system.

The container can be similar as in the hydroponics gardening, or it can be a coir fiber container. It should be half filled with lava rock at the bottom. Then it is preferably to use a medium divider (e.g. coir fiber). The upper part of the tray should contain a mixture of 1/3 horticulture perlite of coarse grade, 1/3 potting soil, and 1/3 of large horticulture vermiculite.

When all this is set, it is necessary to place this container in the grow bed, with water level being a bit lower than the mixture of soils. Such arrangement will ensure the higher efficacy of the organic hydroponic gardening.

Lava rock with the secondary roots of the plants will be submerged in the water, and it will also serve to make this water flow up and moisten the soil mixture. At the same time, the upper layer of medium will be free to absorb the nutrients added directly to the primary roots.

Such hydroponic system saves a gardener from constant controlling and maintaining of the pH level and ppm of the growing medium. Nevertheless, beware of adding too many liquid nutrients to the soil layer: they may leak into the lava rock layer and disarrange your organic hydroponics gardening.