Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Using a Pond Liner to Control Spikerush / Milfoil?

jeeper, you can't get an effective dose by spot treating with fluridone. It has to stay at a certain PPB in the water for a relatively long contact time, and it tends to dissipate too much if used as a spot treatment. For spot treating, you are better off using a contact or systemic herbicide like Renovate, Reward or Navigate.