Beautiful Plants in the Pond

From the shape of the leaves, my guess is this plant is from the Arrowhead family. We have several different Arrowhead plants whose leaves are solid green. This plant however has multi-color leaves most with a bright red trim. This plant spent the winter in the greenhouse and as you can see it did very well.
The floating plants are Azola with which we've had some good luck and some bad luck. For some reason the Azola doesn't do well in the large pond but it has grown well in the 20 gallon bucket. The past two years Azola has grown nicely in the spring but died off in the summer.