Vitalink - Hydro MAX Grow A&B - Hard WaterVitalink The Trusted UK Brand Just Got An Upgrade! If you're growing hydroponically, Hydro MAX provides the solid nutritional foundation that will allow you to create the indoor garden you always dreamed of! It maintains the characteristics that made the original Vitalink MAX such a huge favourite, but improves on it with the inclusion of EDDHA, which regulates the flow of iron to the plant (allowing it to be absorbed over a wider pH range). Another