Clean off any visible aquatic plants, animals, and mud from pontoons, cross members, steps, transom, rudders, chine, wheel wells, mooring ropes, wires, and cables.
Scrub off any floats with a stiff brush.
Rinse landing gear with high pressure hot water, when possible.
At water take-off:
Avoid taxiing through aquatic plants.
Raise and lower water rudders several times to clear off plants
After water take-off:
Raise and lower water rudders several times to dislodge aquatic plant fragments while flying over the waters you left or over land.
If aquatic plants remain visible on aircraft, return to same water body and clean them off.
Drain Pump water from floats before take-off.
Dry everything five days or more, unless otherwise required by local or state laws, when moving between waters to kill small species not easily seen OR wipe with a towel before reuse.
Runway land (if so equipped) or haul out and clean aircraft previously used in known invasive species infested waters as soon as possible after arrival at the destination.
Store aircraft on land when possible. Hot summer temperatures and flights during dry weather will help kill aquatic invasive plants and animals that may be on floats.