You can have Azollo too if you want it.

LOL! No thanks, been there done that, makes one's surface looks messy and
if one has a skimmer.... well you know where the azollo and anything that
floats is. ;o)

Conclusion, if you want the critters to eat the duckweed, cut back on the
chow. ) ~ jan


(Do you know where your water quality is?)