Floating plant id please

I dont know the name but I had lots in my pond some time ago
It does grow fairly fast but not like crazy and tends to take quite a knock in winter in very cold areas
Not sure how invasive it can be in the right conditions so always handle with care and dont throw pieces away where they can get into water ways

 

Salvinia (all types) are massive invaders here, sadly.

 

http://invasives.org.za/plants/aquatic-plants#aquatic-plants-identification-guide

 

there use to be plenty here if you still want >
33°50'45.6"S 18°39'19.4"E

 

Speaking with coordinates, there's also some here: -34,0815118, 18,4560338
As well as water lettuce and azolla. Very invasive but they make good additions to the compost heap.

 

In our area more than half would die with the frost in winter but where the winters are milder yes I think it could become invasive

 

NEVER EVER let a single bit of those plants end up in or even near a natural water source.( and tell the person you sharing it with) If not already there this wretched thing will grow madly in your area. It is considered as a HIGHLY invasive plant. Google KARIBA WEED more info.

 

It is listed as a Catergory 1b invasive species.

Category 1a:
Invasive species requiring compulsory control. Remove and destroy. Any specimens of Category 1a listed species need, by law, to be eradicated from the environment. No permits will be issued.

Category 1b:
Invasive species requiring compulsory control as part of an invasive species control programme. Remove and destroy. These plants are deemed to have such a high invasive potential that infestations can qualify to be placed under a government sponsored invasive species management programme. No permits will be issued.

 

Most of the plants commonly used in aquariums seem to be on the NEMBA blacklist.
Just a couple of the more common floating plants.

Salvinia Natans (Floating Fern or Water Fern)
Salvinia Molesta (Kariba Weed)
Salvinia Minima (Common Salvinia or Water Spangles)
Salvinia Auriculata (Eared Watermoss or Butterfly Fern)
Pistia Stratiotes (Water Lettuce or Water Cabbage)
Lemnoideae Minor (Duckweed)
Limnobium Laevigatum (Amazon Frogbit)
Eichhornia crassipes (Water Hyacinth)
Azolla Caroliniana (Mosquito Fern)