Mechanical/Physical Control Options Eelgrass can be removed by
cutting and raking it from the pond but can reestablish from
remaining roots. Fertilization to produce a phytoplankton or
algal “bloom” prevents the establishment of most bottom rooted
aquatic weeds and produces a strong food chain to the pond fish.
Non-toxic dyes or colorants prevent or reduce aquatic plant
growth by limiting sunlight penetration, similar to
fertilization. Aquashade, Blue Springs, and Crystal Blue are
examples of non-toxic dye and other products are available.
However, dyes do not enhance the natural food chain and may
suppress the natural food chain of the pond. Many types of
mechanical removal devices are available that cut or chop up
aquatic weeds. It is important to remember that many submerged
plants regrow from fragments, so removal of cut fragments many
be necessary to keep from spreading the unwanted plant.
Companies that make cutters and rakes include but are not
limited to Cutting Edge, Jenson Lake Mower, Midwest Aqua C