That particular arrowhead is a regular variety - okay but sort of generic as arrowheads go. If you want a fancy arrowhead purchase a few double flowering arrowheads, put them in small tubs to get them established, transplant when they fill the tub with new plants. Perry's Water Gardens is one source.
Spiral eel grass.
http://www.aquariumplants.com/product_p/va069.htmOthers:
http://www.aquariumplants.com/product_p/va069.htmTaxonomic name: Vallisneria nana
The names include:
Vallisneria americana var. biwaensis (used by John Monore central Indiana on the forum).
See this post by John:
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=261781Other names for the spiral forms used on the internet sites
Vallisneria spiralis
Vallisneria tortifilia
Vallisneria tortissima
Vallisneria torta
Vallisneria asiatica
Vallisneria contortionist
From Wikipedia:
(
http://en.wikipedia.org/wiki/Vallisneria_spiralis)
I don't think the person that wrote the following on Wikipedia was a good botanist.
One form of this plant has been described: V. spiralis f. tortifolia, which has also been elevated to the species level by some taxonomists under the name V. tortissima. The form has tightly twisted leaves. Along with this form, many other trade names have been developed for small variations on the species. Their taxonomic status is uncertain.
All eel grass types (species, subspecies) are essentially warm season plants meaning they sprout and flourish when water temps are above 60F. Some of the forms are more tropical than others and these more tropical forms struggle to survive overwinter under ice cover. I have been working with one Florida strain for 10 yrs trying to get it to successfully over winter in pots 3-4 ft deep during ice cover. What I currently have survives the winter in NW Ohio. It is not real aggressive and struggles to compete with Chara and other aggressive submerged plants that like or thrive in cooler water when the eel grass plants are dormant. Adult tilapia will eat the Chara and allow Chara to be less competition for the eelgrass. Another reason for tilapia. Once the bed is dense and established it seems to do okay.
Dwarf sagittaria
https://www.youtube.com/watch?v=AM3bMoi4pWcFocus on the twisted. Not standard(straight) nor Jungle (Giant).
https://www.youtube.com/watch?v=fa_pMF58aPE http://www.fishandtips.com/displaydb.php?ID=57http://www.petsolutions.com/C/Live-Foreground-Plants/I/Dwarf-Sagittaria.aspxPlant and grow several plants in tubs in the pond and allow to multiply, and then transplant them into the pond.
I prefer the various varieties of aquatic iris compared to cattails. If you must have cattails then strongly consider dwarf cattail commonly available for sale on the web. Dwarf cattail is easier to manage compared to common cattail or the graceful cattail species.
Try making contact to other natural swimming pond people on the internet. All will love to tell you about their pond. There may even be a natural swimming pond forum. Do your homework. There seems to be lots of interest in and quite a few people around the world esp Europe with natural swimming ponds.