New garden, Pond plant list

PlantNotes - acquisition | planting
Acorus calamus (Sweet Flag)variegatus
Alisma plantago-aquatica (Water Plantain) 
Butomus umbellatus (Flowering rush)Disappeared?
Removed from pot and stuck between pebbles. Disappeared? | Aquatic centre
Calla palustris (Bog arum) 
Caltha palustris (Marsh marigold)Slow, but alive
Carex pendula (Pendulous sedge)Doing well, 28 Jun 17
Carex pseudocyperus (Sedge Hop)Doing well. Removed from pot and moved away from pendulous sedge, Jul 17
Cyperus longus (Sweet galingale)Good
Equisetum hymenale (Dutch rush)Removed from pot and stuck between pebbles | Aquatic centre
Eriophorum angustifolium (Common Cotton Grass)Good, but needs more soil and encouragement
Hottonia palustris (Water violet) 
Houttuynia cordata 'Plena' 
Iris pseudacorus 'Crème de la crème' 
Iris pseudacorus (Yellow flag iris)Surprisingly slow
Lysichiton camtschatcensis (White skunk cabbage)Alive, but not kicking. 2 plants, removed from pots, Jul 17
Lythrum salicaria (Purple loosestrife)Single tall flowering stem. Doing well. Removed from pot, Jul 17
Mentha aquatica (Water mint)Good. Needs controlling
Menyanthes trifoliata (Bog bean)Good. Escaped its bag
Myosotis scorpioides (Water forget-me-not)Failed (drowned?)
Pontederia cordata (Pickerel weed) 
Ranunculus lingua (Greater spearwort)Good. Escaped its bag
Saururus chinensis (Chinese lizard's tail) 
Scirpus cernus (Fibre Optic Plant) 
Typha minima (Small reed mace)Good
Veronica beccabunga (Brooklime)Good. Escaped from pot. Soil provided, Jul 17. Now everywhere, Mch 19 - remove quite a lot
Aponogeton distachyos (Water Hawthorn)Slow, but quite good. Dies down in summer
Nymphaea alba 'Candida' (Dwarf white water lily)Slow, but alive
Nymphaea alba (White water lily)Slow, but alive
Nymphoides peltata (Fringed water lily)Slow, but alive
Ceratophyllum demersum (Hornwort)Soon disappeared. Smothered by algae
Ranunculus aquatilis (Water crowfoot)Disappeared
Stratiodes aloides (Water soldier)Doing well. Mch 19