Plant Suitability By Water Hardness

I have hard water and I find that vallis and crypts do very well with little maintenance/attention. The tiger vallis in the hatchet tank is more than a meter long, which is a slight hindrance in an 80cm tank, but the hatchets like cover, so as long as the plants are healthy they stay.
I have echinodoris martii major and some bucephalandra doing well in the river tank, but I have used some RO in that to bring the hardness down a bit, and I dose daily with ferts & liquid carbon.
Apart from that I have managed to epically fail with a wide range of plants in the past, though possibly due to my lack of plant maintenance in most tanks.
I also have some aponogeton ulvaceus in a couple of tanks, which seem to be doing fine with limited attention, but I'm always interested in any information that people have about plants that thrive in hard water.

That's awesome thank you. I've noticed the advanced search function lets you create a list of plants by hardness levels. 

I'm going to be playing with this for a few hours!!!

Hornwort didnt come up, possibly not in their database, pretty sure its a grow anywhere plant anyway! Grows fast in the tank currently.

It's there as ceratophyllum demersum in the ceratophyllaceae section but as a high light demanding plant.

I've had success with bacopa monnieri in the volcanic tank where it's the only plant and in the back of the amazon tank.  You shouldn't have a problem with sagittaria subulata or echinodorus quadricostatus (smaller amazon sword).  Except the problem of where to draw the line in your scape as both of these grow quick and will boss the tank if you let it. 

My hygrophila polysperma rosanervig also gets holes in the bottom leaves.  I'm not 100% sure why but I think the plant concentrates on new growth first.  If you trim those leaves off fresh new leaves grow quick and a lovely green.  I've managed to get a pink sheen on the top most leaves which tells me that they're getting the right nutrients.  With many plants you see pics of them looking great but no steps on how to get there.  I've pruned and trimmed back mine twice and propagated with new stem cuts.

Those are the ones listed that I've had experience with.  Most of the care has been trial and error.  The zosterella dubia looks like heteranthera zosterifolia.  A lot of these plants have multiple names and are being reclassified all the time.  I have some of this growing at the rear of the amazon tank assuming it's the same plant.  It grows very lush and bushy.  I'll zoom in on some of the plants when I do the videos later this week and try and show some of the things mentioned here.

Thanks @marquismirage that's great.