It's probably temp driven....the hyacinth around my big pond has just started taking off the last 2 weeks. Prior to that it was pretty wimpy looking.

I can vouch for the filtering effect it has. My pond will go from 12-18" visibility to 36-48" in the next month or so. REALLY clears the water up. And it makes a great spot for forage to hide and grow all summer....then when it dies off it's game on for the larger predators.


Dale

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"When tempted to fight fire with fire, remember that the Fire Department usually uses water." - anonymous