WM and DW have seed like forms that sink to the pond bottom. They don't become active until the surface plants die and let light through at which point they float to the surface and start to grow. That is why some products call for full water column dispersal for up to 90 days.

See this https://aquaplant.tamu.edu/management-options/watermeal/

Last edited by ewest; 08/09/22 02:55 PM.