CANNA Aqua is the nutrient that has been specifically developed for the use in combination closed hydroponic systems, like NFT or Bubbler systems. With these systems the drainage water isn’t removed but is reused.
In this sort of system the plants are in direct contact with the nutrient solution. Because the plants do not absorb all the nutritional elements with equal speed or in equal amounts, the composition of the nutrient solution changes over time.
CANNA Aqua has been developed in such a way as to ensure that the plants can always absorb the correct combination of nutritional elements that are necessary for optimum growth and bloom. The formula is made up so the plants regulate the pH themselves so that the pH in the nutrient tank always remains within the optimum pH range. This means that having once set the correct starting pH no further correction is necessary.
In this way CANNA makes one of the most complex cultivation systems considerably easier for the grower. There's a reason the majority of growers in the UK, a country where this cultivation method is extremely popular, use CANNA Aqua.