Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants cutrine plus

jrwpmv,

I have used both in the last 3 years.

The liquid will work on FA (Filamentous algae) better on the surface than the granular. The liquid will work on the submerged FA as long as it isn't more than 2 feet down AND the water isn't moving (or expected to move) due to wind. Water movement dilutes the liquid with the surrounding water so reduces the effectiveness on the area being treated. If the water moves, the granular works better because it stays where you apply it.

The granular is much easier to apply especially if you use a hand-help spreader ($5-$10). On the flip-side, it cost more to use the granular because you cannot treat as much water as you can with the liquid. My pond is only a 1.25 acre pond with FA only on the edges during the spring so the extra cost is not important as if I had to treat 20 acres, etc.

Hope this helps!