This method is easy to accomplish with few materials – corn sugar, brewer’s yeast, water, a small bottle and a larger container such as a garbage bag or large glass jug. The process is the same as creating a batch of wine, beer or mead. Once the batch has stopped bubbling the fermentation process has ceased and another batch will need to be made in order to continue the production of carbon dioxide. The pH is the most important factor to monitor because the pH of a nutrient solution reads the outcome of an electrical battle between the roots and everything that surrounds them. The run off from growing plants in pots is the best place to measure the pH level. The protein and enzyme molecules in a plant are structured in very specific shapes in order to catalyze a chemical reaction to build the plant cells. Micronutrients are also needed for proper growth of your plants. Boric acid, manganese chloride, zinc sulfate, copper sulfate and iron sulfate can be used in minute amounts in the nutrient solution. Many people who grow their hydroponic plants in a greenhouse will also find that they need the correct amount of carbon dioxide in the air in order for their plants to flourish. There are many reasons for the drastic differences between hydroponic and soil plants. Root growth is stimulated in the hydroponic plants due to the extra oxygen. Plants with plenty of oxygen in the root system will also absorb nutrients faster. The nutrients in a hydroponic system are mixed with water and sent directly to the root system. Commercial growers are changing to hydroponics like never before as the ideals surrounding the growing techniques touch on subjects that interest most people, including world hunger and making the world cleaner. Everyday people have begun to purchase their own hydroponic systems to grow great tasting and fresh food for their family and friends. Natural enemies will feast on the spider mites until there aren’t enough for the predator to survive, then they will die off or leave in search of more food. Releasing predator insects into your hydroponics garden infestations of spider mites can be eliminated or, they can be avoided. There’s no need to worry with predator insects, because most will not harm your crops.