Canna hydro is the nutrient for systems in which the drainage water is not returned to the nutrient tank but drains away run to waste open hydroponic systems canna hydro has a balanced quantity of all nutritional elements needed by plants as the substrates used in run to waste systems are mostly inert they dont add or take nutrient elements from the nutrient solution all the nutrients have to be in the nutrient solution an excess of nutritional elements can lead to plant damage but the