Pond Boss Forums AQUATIC VEGETATION Identifying plants Is this Chara?

hand pull (PITA), Cutrine or Cutrine plus. If it's small bunches and you don't want to hand pull, I'd use the granular form of Cutrine. No need to mix up a liquid, just sprinkle some on the plants when you see them. Keep the open bag in a dry place.

From the label:
Waters treated with CUTRINE-PLUS may be used for swimming, fishing, drinking, livestock watering or irrigating turf, ornamental plants or crops immediately after treatment. (when used at the recommended dosages)