Autopot root control discs are designed for 1Pot systems, easy2grow kit and Easy2Grow extension kits. These discs are black and gold and should be placed on the tray under the vase with the gold side up. The function of the root control disc is to prevent them from growing out of the pot and reaching the aquavalve. They are very effective due to the gold coating with a special metallic coating. It is important to bear in mind that the roots, despite the sensitivity to this coating, sometimes manage to cross it, therefore it is advisable to lift the pot every now and then to check if they have escaped from the barrier.
Even if the discs have a duration of several seasons, it is advisable to replace them at the beginning of each cycle.