I would not add the phos fertilizer when the weeds and FA are present or you will create a weedy MESS. Get rid of the pondweed and treat the FA with an algaecide then after a week and they are dying then add your fertilizer. Kill the bushy pondweed with brand of diquat herbicide such as Reward, Alligare Diquat, Harvester or Tsunami. It kills and dissipates fast.

Last edited by Bill Cody; 03/09/20 08:49 PM.

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