GT Oxyplus is an incredibly useful product for the grower to have on hand at all times. It is a useful way of adding fresh oxygen to a nutrient solution. At room temperature, a nutrient solution is lucky to have 10 ppm of dissolved oxygen, which can be rapidly depleted by active roots and unless the oxygen is replaced the roots will be growing in a low oxygen environment and their performance will suffer as a consequence. Oxyplus is also a sanitising agent. If added to the nutrient solution on a regular basis it will combat diseases like Pythium, probably the main root disease found in hydroponic systems. The active ingredient in Oxyplus is 50% hydrogen peroxide, so great care is needed when handling this product.